Temat: air transport - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: POLSKIE REGIONALNE PORTY LOTNICZE W OBSŁUDZE RUCHU PASAŻERSKIEGO
Autorzy:: Pilarczyk, Marta
Powiązania:: https://bibliotekanauki.pl/articles/503744.pdf
Data publikacji:: 2006
Wydawca:: Międzynarodowa Wyższa Szkoła Logistyki i Transportu
Tematy:: transport
passenger traffic
air transport
airports
ports
Opis:: The participation of air transport in the service of Polish passenger traffic in area of tourism as well as business travels has been slight in the totality of passenger traffic. From the year 2004 Poland take a part of European Union. In that case the process of demonopolization of transportation market, connected with politics of "Open Air" has been began. Initiating changes in the service of passenger flows transformed also the structure of transportation. In result systematically increase the role of regional airports. Expansion of foreign low-cost carriers take a big part of the transformation of this market. According to prognosis of The Civil Aviation Office (CAO) and IATA, the Polish regional airports could service to over 63 millions of passengers in the year 2030. However it demend considerable investment at airoprts infrastructure and air navigation.
Źródło:: Logistics and Transport; 2006, 3, 2; 41-49
1734-2015
Pojawia się w:: Logistics and Transport
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Analysis of the transport volume of passengers and cargo on the example of the Warsaw-Okęcie international airport (Poland)
Autorzy:: Macioszek, Elżbieta
Ahac, Saša
Powiązania:: https://bibliotekanauki.pl/articles/27314660.pdf
Data publikacji:: 2023
Wydawca:: Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:: air transport
air transport service market
transport
traffic engineering
transport lotniczy
rynek usług transportu lotniczego
inżynieria ruchu
Opis:: Currently, the branch of air transport is one of the most dynamically developing branches of transport. Modern air transport systems provide relatively high quality of services in terms of satisfaction, preferences, and tastes of potential recipients, passengers, and freight operators. Air transport systems use highly advanced technologies, equipment, infrastructure, and appropriate rules and procedures in order to ensure the desired quality of services. The article presents an analysis of the volume of passenger and cargo transport in air transport on the example of the Warszawa Okęcie International Airport (Poland). The analysis covered the years from 2011 to 2021. In addition, the market of air services, and air connections with Warszawa Okęcie International Airport were characterized.
Źródło:: Zeszyty Naukowe. Transport / Politechnika Śląska; 2023, 120; 151--164
0209-3324
2450-1549
Pojawia się w:: Zeszyty Naukowe. Transport / Politechnika Śląska
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: FEM temperature evaluation of model braking test in comparison to selected laboratory test
Autorzy:: Skorupka, Z.
Powiązania:: https://bibliotekanauki.pl/articles/247287.pdf
Data publikacji:: 2015
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
air transport
simulation
friction materials
model braking
Opis:: Friction pair tests or model brake tests are one of the trials done in order to evaluate friction pair materials usefulness in full-scale brakes. Such tests are both time consuming and expensive, so most of the manufacturers want to reduce them as much as possible by using numerical simulations for both time and costs savings. It is not possible to eliminate laboratory tests entirely because of the safety regulations requirements. Without regulatory compliance, no brake material can be used in consumer products such as cars or airplanes. Nowadays most of the FEM programs are capable of simulate braking (friction) process in many of its aspects. Accuracy of calculations varies according to complexity of the model and phenomena taken into account. One of the interesting aspects of braking is the friction temperature generation especially due to its destructive impact on the vehicle brakes. Laboratory evaluation of the temperature can be performed in limited spectrum because of inaccessibility of the friction area. FEM calculations can help to determine temperature changes and temperature value during process. It also helps to determine temperature induced damaging conditions for the friction material or the whole brake design. In this paper author compares FEM of friction temperature calculations and laboratory test performed in Landing Gear Laboratory of Institute of Aviation in Warsaw where author works on daily basis. FEM simulation was created in order to resemble mentioned friction material test and to create model of the geometry of the tested material including test stand parts. All of the calculations were performed using COMSOL MULTIPHISICS software.
Źródło:: Journal of KONES; 2015, 22, 3; 213-219
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Modeling of selected phenomena governing surface icing
Autorzy:: Sznajder, J.
Powiązania:: https://bibliotekanauki.pl/articles/248155.pdf
Data publikacji:: 2013
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: icing
transport
air transport
simulation
two-phase flow
Opis:: Atmospheric icing poses a threat for safety in many areas of transport, especially in air transport and exerts harmful impact on operation of external sensors and mechanisms of aircraft, ships and land vehicles. In order to investigate phenomena leading to ice accretion on sensitive parts of objects exposed to icing conditions numerical simulation models are in use. These models are typically composed of submodels dealing with a fragment of the complex phenomenon of ice accretion and its interaction with external flow. A practical approach to simulation of icing process is to divide it into three problems being solved interactively: 1) simulation of two-phase flow of air and dispersed supercooled water and determination of distribution of mass of water hitting the object’s surface, 2) determination of conditions on the surface collecting supercooled water from the external flow and simulation of freezing and water film flow, and 3) modification of computational grid as a consequence of change of shape of the surface with deposits of ice. A simulation system directed at investigation of atmospheric icing on moving object is being developed as an extension of capabilities of a commercial CFD code ANSYS FLUENT. Solutions of two-phase flow of air and dispersed water with specific boundary conditions enabling the determination of distribution of water hitting the surface, as well as results of modelling of water film flow on the surface will be presented. The system of equations describing the transport of the dispersed water consists of the continuity and momentum equations. It is assumed, that interactions between the phases are onedirectional, i.e. the air flow influences the water droplet flow and not vice-versa. It is also assumed that the water film velocity distribution is linear in direction normal to surface. This way, both phenomena are being described with first order partial differential equations with respect to space and time and the solution approaches may be similar.
Źródło:: Journal of KONES; 2013, 20, 2; 377-384
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Influence of mass changes of flying objects on their dynamic features
Autorzy:: Wiśniewski, W.
Powiązania:: https://bibliotekanauki.pl/articles/246227.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
air transport
dynamics features
resonance researches
mass loss
Opis:: The aim of this work is the experimental study of the weight loss impact on the properties of flying objects. Work is hased on the results of resonance tests of the helicopter, gliders and military aircraft. In the presented flying objeets group the possible occurrence of weight losses during the flight are up to 50%. The paper posed the following questions: How big can be, in practice, the weight loss during the flight? To which resonance the mass loss has the greatest impact? How and by what rules the map of resonances changes? Does in the process of weight loss there are other, worth-knowing events? Gliders, airplanes and a helicopter were investigated in the Resonance Test Laboratory of Institute of Aviation. The author has organized and for over 20 years led the Resonance Test Laboratory at the Institute of Aviation, in which he made or directed the investigations of dozens of aircraft, gliders, helicopters and their elements and components. Effect of weight loss on the flying objeets properties is one of several ,,unusual" research topics phenomena, which the author observed during a standard resonance tests. The resonance of the mode shape of Jantar 15 glider, comparison of the relative increase in the frequencies of the resonances with mode shape for SZD-50 Jantar 15-2 and IS-2 Revelation gliders, results of investigations of the underwing stores loss of mass impact on the „Pattem" aircraft resonances freąuencies, the resonance frequency of the 1-22 Iryda aircraft are presented in the paper. The resonance of the mode shape of Jantar 15 glider, comparison of the relative increase in the frequencies of the resonances with mode shape for SZD-50 Jantar 15-2 and IS-2 Revelation gliders, results of investigations of the underwing stores loss of mass impact on the ,,Pattern" aircraft resonances frequencies, the resonance frequency of the 1-22 Iryda aircraft are presented in the paper.
Źródło:: Journal of KONES; 2010, 17, 4; 591-598
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Modelling of ground handling operations at airport
Autorzy:: Kwasiborska, A.
Powiązania:: https://bibliotekanauki.pl/articles/244049.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
air transport
ground handling
aerodrome traffic
Gantt diagrams
Opis:: In aviation, aircraft ground handling defines the servicing of an aircraft while it is on the ground and (usually) parked at a terminal gate of an airport. Ground handling operations include many activities: passenger handling, ground transport, assistance in blocking the aircraft and delivery ofreąuired equipment, loading and unloading of the aircraft, including provision and operation of required equipment, as well as transport of the crew and passengers between the aircraft and the terminal, transport of luggage between the aircraft and the terminal, catering. This paper presents a fragment of an analysis of the elementary operations performed at the apron and presents model of ground handling at the airport and stochastic analyses. The method of sohing the problem is based upon an analysis of the actual airport operations. During the investigation different ground handling processes schemes and elementary operations identified at the apron were analyzed. Random parameters of the duration ofeach action at the apron were identified. The focus was the problem of increase airport capacity for the ground airport operations. Problem of airport capacity is specifying as airside and landside. The authors present short description of method. It is present ground handling model and some of results of simulation.
Źródło:: Journal of KONES; 2010, 17, 3; 253-261
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Analysis of the process of operating an aircraft from aspect of flight safety and effectiveness
Autorzy:: Żurek, J.
Powiązania:: https://bibliotekanauki.pl/articles/245779.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
air transport
durability
relibility
semi-Markov process
availability factor
Opis:: This paper presents the method of evaluation of a technical object as immersed in a logistic system with regard to its durability, the operational availability/readiness and the utilisation factor. These factors decide upon the object's effectiveness. For this evaluation probabilistic models from the theory of reliability and of the semi-Markov process were used. For the purpose of this paper as a technical object serves an aircraft. The process of operating an aircraft consists in using its resources to function accumulated during the process of its manufacture and resulting from a periodic regeneration of these resources in order to maintain its capability of being further operated. For the sake of better understanding our discussion we will refer to the sald 'flying craft' as an aircraft (including also other 'means of transport' into this notion). The paper in principle concerns on analysis of safe durability and aircraft availability/readiness analysis. The availability factor of an object in a logistic system expresses the prospective possibility of an effective action. The degree of utilisation of this „potential" for apassenger plane is represented by the occupancy factor. A product ctors of availability and occupancy can describe the overall effectiveness indicator, which characterises the availability and the market demand.
Źródło:: Journal of KONES; 2009, 16, 3; 527-536
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: The use of light aircraft in domestic transport in Poland
Autorzy:: Kołodziejczyk, R.
Powiązania:: https://bibliotekanauki.pl/articles/241893.pdf
Data publikacji:: 2014
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
small aircraft transport
domestic air transport
routes analysis
passengers flow
Opis:: The work concerns the analysis of the possibilities of using light aircraft in the regional passenger transport. This analysis was based on the existing airport infrastructure in Poland. Between 43 existing airports with paved runways and length more than 1,000 meters potential routes of aircraft traffic were set. The study compared the light aircraft transport to the car transport. One of the benchmark criteria was the travel time between different destinations, using both means of transport. The second criterion is the financial aspects of travel. For this purpose, a statistics of light aircraft and calculated their Direct Operating Cost as a function of various parameters such as maximum weight, the number of passenger seats, cruise speed were created. Analysis also included air navigation charges on the routes and the operator profit. The calculations allowed identifying potential routes where the plane would be competitive with the car in terms of travel time and costs by one person. The number of these routes was dependent on the speed of travel, the number of seats on the plane as well as the fill factor of these seats. The analysis also applies to determine the number of passengers traveling between the regions. In 2013, domestic air transport handled less than 2.5 million passengers, which in comparison to the countries of Western Europe is a poor result. This is caused mainly by a small amount of domestic routes as well as a small number of regional airports. The implementation of the concept of using light aircraft in regional connections aims to increase the speed of travel, increase the safety in passenger transport, cost reduction and partial replacement of road transport by air transport.
Źródło:: Journal of KONES; 2014, 21, 4; 239-246
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Functioning of selected airports in Poland
Autorzy:: Macioszek, Elżbieta
Powiązania:: https://bibliotekanauki.pl/articles/2091221.pdf
Data publikacji:: 2021
Wydawca:: Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:: transportation
air transport
civil engineering and transportation
transport
transport lotniczy
inżynieria lądowa i transport
Opis:: Nowadays, air transport is treated as a dynamically developing sector of the world economy. The technological solutions used in this kind of transport are highly advanced; thus, generate high costs, ranging from research through production to the implementation phase. Due to its technological advancement, air transport has several significant advantages over other kinds of transport. This paper presents the characteristics of selected airports in Poland together with statistical data characterising the functioning of the airports. In addition, the plans in recent years regarding the development of air transport infrastructure in Poland were summarised.
Źródło:: Zeszyty Naukowe. Transport / Politechnika Śląska; 2021, 112; 135--144
0209-3324
2450-1549
Pojawia się w:: Zeszyty Naukowe. Transport / Politechnika Śląska
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Optimum specialization fields of multitask air transportation system components
Optymalne obszary specjalizacji elementów wielozadaniowego systemu lotniczego
Autorzy:: Majka, A.
Klepacki, Z.
Powiązania:: https://bibliotekanauki.pl/articles/950144.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
transport lotniczy
lotnicze systemy transportowe
optymalizacja
optymalny podział zadań
air transport
air transportation systems
optimisation
optimum task distribution
Opis:: An individual characteristic of technical objects utilized in aviation (and not only in aviation) is their multipurpose and multitask. These properties regard both single airplane and sets of airplanes (fleet of airplanes). It is expressed by task variety, which fleet of airplanes (airline) must realize, and in variety of working space. Set of various both length air routes and airplanes traffic density constitutes set of tasks. The only way to increase affectivity is utilize airplane in restricted field (specialization). Technical differences and individual geographic and climatic characteristics of airdromes are operating conditions. Set of tasks and operating conditions of airplanes define multitasks (general-purpose) of the character of their application. N algorithm of determination of airplane fleet optimal specialization fields is presented. Some example results are presented for a hypothetical airplane fleet of twin-engine, pistonprop and turboprop, general aviation, transport category aircrafts. In calculated example airplanes geometry and tasks set characteristics are fixed. The analysis objective is searching of airplanes optimum specialization fields.
Cechą charakterystyczną pojedynczych samolotów i ich zbiorów, składających się na określony park lotniczy jest wielozadaniowość i wykorzystywanie ich w ramach większych systemów. Przejawia się ona rozmaitością celów, które musi zrealizować park samolotów (np. Linia lotnicza), oraz różnorodnością warunków jego funkcjonowania. To właśnie definiuje wielozadaniowy (uniwersalny) charakter zastosowania samolotów. Drogą do zwiększenia efektywności dla użytego wskaźnika jest wykorzystywanie samolotu nie w całym obszarze możliwych zastosowań, lecz w obszarze zawężonym (specjalizacja). Powoduje to konieczność znalezienia optymalnego rozkładu zadań pomiędzy „konkurującymi" samolotami w celu wyznaczenia obszarów specjalizacji dla każdego z nich. W pracy przedstawione zostało rozwiązanie zadania, polegającego na znalezieniu optymalnych obszarów specjalizacji (będących podzbiorami zbioru zadań całego systemu) elementów wielozadaniowego systemu lotniczego. W pracy zawarty został opis metody i algorytmu rozwiązywania zagadnienia optymalnego rozkładu zadań systemu wielozadaniowego, opracowanych z wykorzystaniem wskaźnika jakości lokalnej. Przy tworzeniu zaprezentowanego algorytmu wykorzystano ogólne własności zbioru realizowanych zadań i wskaźnika efektywności całego systemu oraz specyficzne własności sytemu lotniczego i wskaźnika oceny efektywności lokalnej. Dla zilustrowania prezentowanego zagadnienia przedstawiony został przykład obliczeniowy polegający na znalezieniu obszarów specjalizacji dla wybranych typów samolotów hipotetycznego parku lotniczego. Obliczenia wykonane zostały dla parku samolotów krótkiego zasięgu.
Źródło:: Journal of KONES; 2007, 14, 3; 363-370
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Electric energy balance of the Rotax 912 with fuel injection
Autorzy:: Skiba, K.
Czarnigowski, J.
Powiązania:: https://bibliotekanauki.pl/articles/247464.pdf
Data publikacji:: 2017
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: electric energy balance
air transport
combustion engine
transport
bilans energii elektrycznej
transport powietrzny
silnik spalinowy
Opis:: A majority of ultralight aircraft is powered by the Rotax 912 ULS, which is a four-cylinder carburettor piston SI boxer engine. However, its power-to-power advanced aircraft is insufficient. This article discusses the examination of the Rotax 912 fitted with a modified power system and mechanical charging to increase the power of a base unit by 36%. This engine was developed as a collaborated project of the Lublin University of Technology and the AVIATION ARTUR TRENDAK & SON GmbH, a manufacturer of autogyros. Sources of energy in the Rotax 912 are generated with a generator integrated with an ignition system of a maximum power of 250 W at 5800 rpm and 13.5 V [1]. The technology of fuel injection and charging required us to apply control systems and to measure engine-operating parameters, which resulted in higher electric energy demand. Additionally, a mechanical pump was replaced with a more efficient electric pump, which also changed electric energy balance. The examination was conducted on the test stand of the Department of Thermodynamics, Fluid Mechanics and Aviation Propulsion Systems of the Lublin University of Technology. The measurement system consisted of the Tektronix TCP305 current probes and TCP A300 converters. Signals were recorded with data acquisition cards and the National Instruments Ni CompaktDAQ module. Power consumption was measured for the selected speed ranging from 2000 to 5800 rpm. The current probes were appropriately installed on power cords. The probes recorded respectively the power consumed by the fuel pump, the energy demand of the lambda sensor, and the electricity taken by the ECU. The data obtained was converted with the author's script in LabVIEW. Based on the results, the highest electricity demand shows the fuel pump. Furthermore, increasing engine speed and load results in higher pressure in the fuel system and consequently in the higher power demand of the pump. The pump consumes up to 89% of all energy consumed by the system. In the control system, the highest demand shows lambda sensor BOSCH LSU4.2 [4]. With the increase in speed, the exhaust gas temperature increases, which leads to less power consumed by the heater of the sensor head. The demand of the other measurement systems and actuators is less than 10.6% of total consumption. The investigation shows that the total power demand of this new system ranges from 63 to 73 W, which is from 24 to 70% of the total power output from a generator mounted on the engine.
Źródło:: Journal of KONES; 2017, 24, 1; 317-323
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Wielomodelowe prognozowanie liczby pasażerów przewożonych krajowym transportem lotniczym w Stanach Zjednoczonych w 2021 r.
Multi-model forecast of the number of passengers transported by domestic air transport in the United States for 2021
Autorzy:: Kozicki, Bartosz
Sowa, Bogdan
Powiązania:: https://bibliotekanauki.pl/articles/2085882.pdf
Data publikacji:: 2021-07-31
Wydawca:: Polskie Wydawnictwo Ekonomiczne
Tematy:: transport
transport lotniczy
COVID-19
prognozowanie
analiza szeregów czasowych
air transport
forecasting
time series analysis
Opis:: W artykule przedstawiono dane dotyczące liczby pasażerów przewiezionych pasażerskim transportem lotniczym krajowym i międzynarodowym w Stanach Zjednoczonych w ujęciu miesięcznym w latach 2003–2020 i ich prognozowania na 2021 r. Badania rozpoczęto od analizy i oceny dwóch szeregów czasowych dotyczących liczby pasażerów przewiezionych transportem lotniczym pasażerskim w Stanach Zjednoczonych w ujęciu krajowym i międzynarodowym. Zbudowano model Kleina, za pomocą którego wykonano prognozowanie szeregu czasowego liczby pasażerów przewożonych transportem lotniczym krajowym w ujęciu miesięcznym na rok 2021. Zbudowany model jest połączeniem prognozowania ilościowego i jakościowego.
The article presents data on the number of passengers transported by domestic and international passenger air transport in the United States on a monthly basis in the years 2003–2020 and their forecasting for 2021. The research began with the analysis and evaluation of two time series concerning the number of passengers transported by passenger air transport in the United States in terms of national and international approach. The Klein model was built, which was used to forecast the time series of the number of passengers transported by domestic air transport on a monthly basis for the year 2021. The constructed model is a combination of quantitative and qualitative forecasting.
Źródło:: Gospodarka Materiałowa i Logistyka; 2021, 7; 23-32
1231-2037
Pojawia się w:: Gospodarka Materiałowa i Logistyka
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: An airspace model aplicable for automatic flight route planning inside free route airspace
Model przestrzeni powietrznej umożliwiający automatyczne planowanie lotu we free route airspace
Autorzy:: Drupka, G.
Majka, A.
Rogalski, T.
Trela, L.
Powiązania:: https://bibliotekanauki.pl/articles/195838.pdf
Data publikacji:: 2018
Wydawca:: Politechnika Rzeszowska im. Ignacego Łukasiewicza. Oficyna Wydawnicza
Tematy:: transport
navigation
air transport
flight planning
flight safety
nawigacja
transport lotniczy
planowanie lotu
bezpieczeństwo lotnicze
Opis:: The article is strongly related to the Single European Sky ATM Research (SESAR) project. The project’s objective is the improvement of air transport above Europe 0. Since Air Traffic Management (ATM) is involved to obtain more effective approach to air traffic flow managing activities, the concept of Flexible Use Airspace (FUA) has arisen in result. ATM is a quite developed aviation’s subdomain, therefore currently existing airspace state has been described briefly in the article, referring to the presented solution concept. The notion of Free Route Airspace (FRA) airspace model defined in this article relies on mathematical description. The selected approach clarifies airspace as a set of squares or cubes that have volumes with appointed values due to certain conditions in the considered time (i.e. traffic flow or weather). The model has to ensure facilitation of flight route planning and warrant aircrafts separation towards flight safety assurance. The concept assumes that this airspace model will provide assistance for airspace user to select essential flight plan criteria, such as economy, time, etc. The path will be appointed according to personal preferences, based on the model from which further elaborated algorithm will evaluate situation. The presented solution is a response to air traffic growth. Therefore it supports the SESAR project through research and development activities. The description proves that airspace model would create enhancement in flight planning for airspace users.
Artykuł przedstawia koncepcję zamodelowanej przestrzeni powietrznej w sposób umożliwiający automatyczne planowanie lotu w Przestrzeni Lotów Swobodnych (Free Route Airspace – FRA). Zaprezentowany model usprawnia czynności składania planu lotu przez użytkownika, jednocześnie gwarantując bezpieczną separację statków powietrznych. Tematyka artykułu jest związana z badaniami do projektu Jednolitej Europejskiej Przestrzeni Powietrznej (Single European ATM Research – SESAR), której podstawowe założenie stanowi poprawa efektywności i bezpieczeństwa operacji w transporcie lotniczym. Efektywniejsze Zarządzanie Ruchem Lotniczym (Air Traffic Management – ATM) jest możliwe przez wprowadzenie koncepcji Elastycznego Zarządzania Przestrzenią Powietrzną (Flexible Use of Airspace – FUA). Elastyczne Zarządzanie Przestrzenią Powietrzną pozwala na monitorowanie dostępności przestrzeni w różnych odstępach czasowych, w sposób umożliwiający uwzględnienie planowanego natężenia ruchu wobec innych warunków, np. atmosferycznych. Przedstawiony w artykule opis przestrzeni powietrznej opiera się na opisie matematycznym. Przyjęte zostało założenie, że cała przestrzeń powietrzna składa się z jednakowej wielkości kwadratów (lub sześcianów w przypadku przestrzeni 3D). Każdy kwadrat lub sześcian ma przydzieloną pojemność wraz z wartościami określającymi dostępność w ustalonym czasie. Dostępność jest uwarunkowana przez wiele czynników, np. zagęszczenie ruchu lotniczego. Wykonane badania wskazują, że zamodelowana w ten sposób przestrzeń powietrzna stwarza potencjał do planowania lotu. W konsekwencji wprowadzenia przez użytkownika dwóch punktów lotu – początkowego i końcowego, przeszukana w następstwie przestrzeń pozwala na przeanalizowanie i zaproponowanie przez system trasy według przyjętego kryterium.
Źródło:: Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika; 2018, z. 90 [298], 1; 5-18
0209-2689
2300-5211
Pojawia się w:: Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Computational model of high altitude aircraft aerodynamics
Autorzy:: Zalewski, W.
Powiązania:: https://bibliotekanauki.pl/articles/242754.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: transport
air transport
simulation
propeller-driven unmanned airplane
propeller-wing interaction
low Reynolds number flows
Opis:: The paper presents computational fluid dynamics hybrid model for analysis of complex flow composed of flow zones at low Reynolds number and flow zones at relatively high Reynolds number conditions. In the described model both ranges of the flow are separated and resolved independently using different way of simulation. That kind of phenomenon is typical for aerodynamics of unmanned propeller driven aircrafts operating at very high altitude conditions (stratospheric). That type of aerial vehicles is now used for military and scientific purposes. In many cases, the wings of a plane are operating at relatively high Reynolds number flow conditions and low angles of attack while the parts of the propeller blades are working at low Reynolds number flow condition and high angles of attack. Described numerical model was used for analysis of the impact of working propellers on the aerodynamics of the aircraft. Analysis was made on the example of a twin-engine, unmanned aircraft with electric motors during the high altitude flight. Three configurations were studied and compared: the plane without propellers, the plane with pusher propellers and the plane with tractor propellers. For each configuration, distributions of aerodynamic coefficients along the span of the wing and their global values for the entire aircraft were estimated. Calculations were performed using the Fluent solver with implementation of a model of propeller based on the Blade Element Theory. Results of the analysis indicate a slight advantage of the tractor propellers configuration.
Źródło:: Journal of KONES; 2016, 23, 1; 437-444
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Dynamics of transportation development as a basis for the development of logistics in Poland
Dynamika rozwoju transportu jako podstawa rozwoju logistyki w Polsce
Autorzy:: Skibińska, W.
Powiązania:: https://bibliotekanauki.pl/articles/404678.pdf
Data publikacji:: 2013
Wydawca:: Politechnika Częstochowska
Tematy:: transport
modes of transport
goods
road transport
rail transport
air transport
maritime transport
pipeline transport
gałęzie transportu
dobra
transport drogowy
transport kolejowy
transport lotniczy
transport morski
transport rurociągowy
Opis:: Transportation is one of the main aspect of logistics development in Poland, even if this is due to the fact that the costs for transportation are from 25% to 40% of total costs in the total cost of logistics. This causes that it is transportation, in addition to procurement processes, production, storage and distribution is the most important process within the logistics supply chain. This article on production and transport being the type used in the Polish logistics, presented as in the period 2009-2011 was as its dynamics and development.
Transport jest jednym z najważniejszych aspektów rozwoju logistyki w Polsce. Jest to spowodowane chociażby faktem, że koszty ponoszone z tytułu transportu stanowią od 25% do 40% ogółu kosztów w całkowitych kosztach logistycznych. To powoduje, że właśnie transport, obok procesów zaopatrzenia, produkcji, magazynowania czy dystrybucji jest najważniejszym procesem w obrębie logistycznego łańcucha dostaw. Niniejszy artykuł po przedstawieniu istoty transportu i jego rodzajów wykorzystywanych w obszarze polskiej logistyki, prezentuje jak w okresie 2009-2011 kształtowała się jego dynamika i rozwój.
Źródło:: Polish Journal of Management Studies; 2013, 7; 290-298
2081-7452
Pojawia się w:: Polish Journal of Management Studies
Dostawca treści:: Biblioteka Nauki

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