Temat: Propulsion - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Analysis of propulsion system failures in the fishing fleet operating from Polish ports
Analiza awarii układów napędowych floty rybackiej operującej w oparciu o polskie porty
Autorzy:: Behrendt, C.
Rajewski, P.
Powiązania:: https://bibliotekanauki.pl/articles/256120.pdf
Data publikacji:: 2008
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Technologii Eksploatacji - Państwowy Instytut Badawczy
Tematy:: fishing
fishing boat
propulsion
failures
propulsion system
Opis:: Part of the research work on "Fishing craft modernization program for the reduction of power consumption and minimization of environmental impact" funded by the EU is an analyses of fishing vessel power systems. Failures occurring in the propulsion systems of Polish fishing boats and cutters are analyzed, covering the years 1999-2007. The effect of the failures on the marine environment has been assessed.
Artykuł oparty jest o dane zebrane w ramach wykonywania pracy badawczej "Program modernizacji jednostek rybackich w aspekcie zmniejszenia nakładów energetycznych i oddziaływania na środowisko" w ramach grantu UE. W artykule przedstawiono analizę awarii układów napędowych polskiej floty rybackiej, tj. łodzi i kutrów rybackich, które to awarie miały miejsce w latach 1999-2007. Oceniono wpływ zaistniałych awarii na zagrożenie dla środowiska morskiego.
Źródło:: Problemy Eksploatacji; 2008, 1; 147-152
1232-9312
Pojawia się w:: Problemy Eksploatacji
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Model tests of the resistance, propulsion and manoeuvrability of ships in the Experimental Centre in Ilawa
Autorzy:: Welnicki, W.
Powiązania:: https://bibliotekanauki.pl/articles/260211.pdf
Data publikacji:: 2007
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: resistance
propulsion
manoeuvrability
ships
Opis:: Paper presents the development of resistance, propulsion and steering quality model tests carried out on lake. Such pioneering investigations began in 1956 and were gradually improved and extended. Original equipment and measurement methods were developed. The paper presents those research methods and techniques,and also accuracy of the results, in a historical perspective. Described are also several most important research programmes accomplished in the Centre.
Źródło:: Polish Maritime Research; 2007, S 2; 8-12
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Identification of design parameters for microgasturbine engines
Autorzy:: Czarnecki, M.
Powiązania:: https://bibliotekanauki.pl/articles/242372.pdf
Data publikacji:: 2015
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: turbine engines
gasturbine
micro
propulsion
Opis:: The research object consists study of simplified turbojet engine known as a Schreckling design. Simplified layout is related to single centrifugal compressor and single axial turbine design (1R-1T). Presented design is favoured in model gasturbines that uses common compressor rotor from automotive turbochargers. Input data for further calculations was obtained from Garret turbo systems compressor performance maps. Total pressure and total to static stage efficiency was assumed from map of contours at maximum stage efficiency. Additional data from database allowed determining outer diameter and rotational speed of the compressor rotor. Collected data was applied to gasturbine thermogasdynamics model. Decision variables: mass flow rate from 0.1-0.8 [kg/s] range, and exhaust gas temperature from 800-1200 [K] range was taken into account. Turbine expansion ratio was calculated with thermo-mechanical coupling conditions for engine continuous operation. Calculated engine thrust and specific fuel consumption was presented in reference to AMT Netherlands microgasturbine range. Presented results allow to rapid identification of design parameters at early stage of design Obtained results allow to omit thermogasdynamics calculations and focus on the design of the individual engine components. Number of computational models is reduced by 20-30% in reference to given assumptions.
Źródło:: Journal of KONES; 2015, 22, 4; 79-85
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Preliminary research of microgasturbine injection ring
Autorzy:: Czarnecki, M.
Orkisz, M.
Wołoszyn, T.
Powiązania:: https://bibliotekanauki.pl/articles/247528.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: gasturbine
rc gasturbine
propulsion
fuel supply
Opis:: Fuel supply systems used in microgasturbines are designed in experimental way. In literature they exist as geometrically prescribed that is proper in general. In commercial aeroengines injection system is the most vulnerable part which failure generates high thermal loads and causes overheating of whole "hot section " or part of it. Microgasturbines are subjected to overheating due to relative short combustion section and uneven fuel distribution in injection points. Presented article contains preliminary research of fuel injector ring designed for microgasturbine turbojet. Tested fuel collector is supplied from the single source and feeds five vaporizers. Investigations are focused on mass flow measurement from each supply point. Research methodology is similar to supervisory tests carried out on commercial aeroengines. Injector was tested with two types of microfuelpumps: JetCAT A60I405 and FlightWorks 200C. As a working liquid the JET A l kerosene was used For each probe constant volume of liquid was pumped through the system. Pumps were tested infull operational range of voltage. Electric power characteristics were obtained for fuel pump and whole fuel system. The strong influence of throttling on stability of microfuelpumps was affirmed. As a conclusion there is a modernization proposal that aims on quality and quantity of fuel distribution.
Źródło:: Journal of KONES; 2010, 17, 4; 117-122
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Experimental research on influence of geometrical configuration on high pressure hydrogen outflow ignition process
Autorzy:: Oleszczak, P.
Mężyk, Ł.
Wolański, P.
Powiązania:: https://bibliotekanauki.pl/articles/245405.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: propulsion
safety
hydrogen
ignition
visual registration
Opis:: Hydrogen is regarded as a potential future fuel for various kinds of vehicles: fuel cell cars, trucks, buses etc. Storing and transportation issues are the crucial safety problems concerned with utilization ofhydrogen. Because of its very łów density hydrogen needs to be stored under very high pressure, in range of 35 division sign 70 MPa, and this create hazard of sudden discharge of hydrogen leading to ignition and severe accident. The aim of the presented research is an experimental investigation of hydrogen ignition as a result of a compression and heating of air by shock wave generated by the discharge of the hydrogen. Mixing of the air heated up by the shock wave and expanding hydrogen can produce combustible mixture of sufficiently high temperature and can lead to ignition. The critical conditions for ignition depend mainly on hydrogen discharge pressure, geometrical configuration, parameters of the ambient air, obstacles, etc. Experimental research -was conducted on a facility specially constructed in Combustion Laboratory, the Institute of Heat Engineering, Warsaw University of Technology. The facility consists from the pressure tank and high pressure hydrogen installation. To allow visualization the observation section is equipped with high quality optical windows. Schlieren visualization system and high speed digital camera was used to register high pressure hydrogen outflow and potential ignition. The high speed digital camera was used to take Schlieren or direct pictures of the process. Additionally, the experiment is registered with use of conventional digital camera. Experiments were conducted for different discharge pressure of hydrogen and outflow to "open space " as well to specially prepared obstacles. Critical condition for which ignition occurs were evaluated for both cases. The high speed Schlieren and direct pictures taken during the experiments are presented in the paper. The influence of presence of obstacles on the feasibility of hydrogen ignition during outflow from high pressure installation is discussed and analyzed.
Źródło:: Journal of KONES; 2009, 16, 4; 357-366
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Flight characteristics of helicopter turboshaft engine with free turbine
Autorzy:: Czarnecki, M.
Orkisz, M.
Powiązania:: https://bibliotekanauki.pl/articles/243360.pdf
Data publikacji:: 2007
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: propulsion
engine
turboshaft
helicopte
performance
ceiling
Opis:: Numerical model for selected turboshaft engine is highly required by helicopter and aircraft designers. Presented paper includes key features for turboshaft numeric model builders. The study of the real performance and estimated results showed that presented method is exact for higher throttle levels. Presented method will be useful for preliminary design when is no need to acquire real test data. Numerical model was build for steady state operations, because maintenance manual for selected engine includes tests records only at its state. In that case helicopter turboshaft manuals are very similar, steady state was used widely for testing in TB3 and T700 family engines. Steady state reduced effect of rotor head positions which was influencing total engine performance. TB3-117 helicopter turboshaft engine, engine cutaway sections, first step - expansion ratios, second step - on the ground calculations for different throttle position, engine inlet mass flow ratio as a function of maximum allowable EGT, and throttle position, third step - on the ground calculations for different throttle position, second step - on the ground calculations for different throttle position, performance charts for RR-250 BJ turboshaft, and for TB3-117 M/MT - Mi-14/17, TB3-117 III-series Mi-24 are presented in the paper.
Źródło:: Journal of KONES; 2007, 14, 3; 149-151
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Propulsion configuration effect on performance of an inverted joined wing airplane
Autorzy:: Galiński, C.
Sieradzki, A.
Kalinowski, M.
Powiązania:: https://bibliotekanauki.pl/articles/244405.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: inverted joined wing
propulsion
performance
CFD
Opis:: Efficiency is crucial for an airplane to reduce both costs of operations and emissions of pollutants. There are several airplane concepts that potentially allow for increasing the efficiency. A few of them were not investigated thoroughly enough yet. The inverted joined wing configuration, where the upper wing is positioned in the front of the lower one is an example of such a concept. Therefore, a project consisting of an aerodynamic analysis and optimisation, development of the software for multidisciplinary optimisation, development of an electric propulsion system, development of an experimental scaled demonstrator, wind tunnel testing and flight-testing was undertaken by consortium led by the Institute of Aviation, including also Warsaw University of Technology, Air Force Institute of Technology and small company MSP. Results of this project led to the conclusion that inverted joined wing configuration allows to build an airplane with the best performance in the world, but its advantage against conventional airplanes is marginal. One reason for this is large trimming drag of the configuration with relatively high position of the thrust vector. Therefore, other configurations of the propulsion were also considered to see if airplane performance could be further improved. This effort is described in the present paper.
Źródło:: Journal of KONES; 2016, 23, 3; 135-141
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Optimizing the lever propelling system for manual wheelchairs
Autorzy:: Choromański, W.
Fiok, K.
Dobrzyński, G.
Powiązania:: https://bibliotekanauki.pl/articles/201679.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: wheelchair
levers
lever-drive
optimization
propulsion
pushing
Opis:: The article concerns the optimization of manual wheelchairs with a lever propelling system. Lever-driven manual wheelchairs are a promising wheelchair group, however they still need to be improved in order to compete successfully with classic manual push rim-driven wheelchairs. Also, despite all manual wheelchairs human work efficiency during propulsion plays an important role, there is not enough research carried out that would focus on this problem regarding lever-driven wheelchairs. The research, presented in this paper, according to the authors' intention, is to make this knowledge gap smaller. The article describes an analytical optimization method for adjusting important lever-drive system parameters - levers length and its axis of rotation position - to individual human anthropometry. The method is based on experimental data regarding maximum human push capabilities acquired in another study. The optimized parameters' values were determined after assessment of maximum human expendable energy during a single work phase (pushing the levers). As a result of this study authors determined optimal levers length and their axis of rotation position for a 50 percentile French male. The carried out research shows also, that the suboptimal area for positioning the levers axis of rotation is relatively wide.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2012, 60, 4; 793-800
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Analiza rozwiązań technicznych napędu głównego śródlądowych jednostek pływających w aspekcie bezpieczeństwa żeglugi i ekologii
Analysis of technical solutions for main propulsion inland vessels navigation safety and ecology
Autorzy:: Łosiewicz, Z.
Powiązania:: https://bibliotekanauki.pl/articles/314496.pdf
Data publikacji:: 2017
Wydawca:: Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:: ochrona środowiska
żegluga
napęd
environment protection
shipping
propulsion
Opis:: W artykule omówiony został problem napędu głównego śródlądowych jednostek pływających w aspekcie bezpieczeństwa żeglugi i ekologii. Przedstawiono przykładowe rozwiązanie techniczne spełniające wymagania bezpieczeństwa żeglugi i przepisów ochrony środowiska.
Paper discussed the problem of main propulsion inland waterway vessels in terms of shipping safety and ecology. This is an example of a technical solution that meets shipping safety and environmental regulations.
Źródło:: Autobusy : technika, eksploatacja, systemy transportowe; 2017, 18, 6; 308-311, CD
1509-5878
2450-7725
Pojawia się w:: Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Hydrogen Peroxide as a High Energy Compound Optimal for Propulsive Applications
Autorzy:: Rarata, G.
Rokicka, K.
Surmacz, P.
Powiązania:: https://bibliotekanauki.pl/articles/358739.pdf
Data publikacji:: 2016
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:: hydrogen peroxide
HTP
explosibility
detonability
monopropellant
oxidizer
propulsion
Opis:: This paper presents the authors’ experience in the field of the safe preparation and utilisation of HTP (98%+), a storable propellant that is finding use in various engineering applications. Brief characterisations of the material as well as examples of its potential use within relevant industries are provided. Additionally, some of the existing data and current research are included to demonstrate the full potential of this material which meets most of the needs of the propulsion industry. The laboratory technique for obtaining the substance that has been developed recently at the Institute of Aviation is briefly described. Utilisation of the method based on a special glass apparatus allows reproducible amounts of the substance to be obtained with relatively little risk.
Źródło:: Central European Journal of Energetic Materials; 2016, 13, 3; 778-790
1733-7178
Pojawia się w:: Central European Journal of Energetic Materials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Preliminary design of micro scale turbojet
Autorzy:: Czarnecki, M.
Orkisz, M.
Powiązania:: https://bibliotekanauki.pl/articles/248091.pdf
Data publikacji:: 2008
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: propulsion
micro gasturbines
preliminary micro gasturbine design
rc gasturbine
Opis:: During the development of the small gas turbine, the most important calculations comes from preliminary design process which gives a shape of airflow duct and limits available space for each component of the engine. Micro scale jet engines are not simply reduced-scale model of the full-size engines. The basic method of working is the same, but the are special considerations which demands a different approach to the main design. There are few similarities to the first generation of turbojets, for both critical dimensions comes from compressor and combustor. Micro gas turbine in the contrast to jet engines does not possess the mechanical coupling to the group of accessories. All accessories are electric driven. Small fuel pumps supply fuel line with pressure that hardly exceeds pressure that comes from compressor. The lubrication system is connected to the main fuel line. Bearings are lubricated with mixture of kerosene and turbine oil. Main difficulties in the process of preliminary design come from connecting of the each engine component. Narrow margin that consist limitations from rotational speed, overall dimensions, thermal and centrifugal loads ,overall efficiency and lack of knowledge about design process for small gasturbine makes up challenge for skilled designers.
Źródło:: Journal of KONES; 2008, 15, 3; 83-87
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Design Optimization of the Biomimetic Undulating Fin of a Knife Fish Robot
Autorzy:: Meera, A. A.
Sudheer, A. P.
Powiązania:: https://bibliotekanauki.pl/articles/385260.pdf
Data publikacji:: 2016
Wydawca:: Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:: mechanism
underwater robot
propulsion
optimization
biomimetic design
fish robot
Opis:: Median Paired Fin Propulsion used by fishes like knife fish, has the potential to replace current energy inefficient underwater propulsion systems. This paper quantizes the efficiency of a fin mechanism based on its ability to incorporate a large number of undulations. Characteristic ellipses of a mechanism were defined, based on which two algorithms were defined to measure the capabilities of the mechanism. The available workspace of the mechanism was optimized to accommodate the undulation requirements of the robot based on the formulations. Further, the distortion effect on the waveform was identified and the optimization was redefined to obviate its possibility while in operation.
Źródło:: Journal of Automation Mobile Robotics and Intelligent Systems; 2016, 10, 1; 26-33
1897-8649
2080-2145
Pojawia się w:: Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Green rocket propulsion research and development at the institute of aviation : problems and perspectives
Autorzy:: Surmacz, P.
Powiązania:: https://bibliotekanauki.pl/articles/246498.pdf
Data publikacji:: 2016
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: propulsion
rocket engine
experimental research
green propellant
hydrogen peroxide
Opis:: The paper presents the main activities of the Institute of Aviation (IoA) in the field of chemical rocket propulsion. The relatively "fresh" research and development team performed many useful works within the last 5 years, starting from the strategy and ideas. Nowadays, the Space Technology Department of IoA acts as a member of international consortia realizing space projects, as well as itself working on its own assignments financed by the European Space Agency (ESA) and IoA funds. The important development aspect of rocket propulsion developed at IoA is the use of "green" propellants. These are chemicals, which are relatively safe for the environment and personnel, being a very promising alternative for storable toxic substances, e.g. hydrazine and derivatives, nitrogen tetroxide. R&D activities of STD are based on the use of Rocket Grade Hydrogen Peroxide (RGHP), also known as High Test Peroxide (HTP). This high-performance mono-propellant and oxidizer is regarded by European entities as one of the most promising candidates to replace hydrazine and its derivatives in the future. Due to numerous advantages, hydrogen peroxide is better suited for systems with human interaction that most of other propellant combinations. The paper contains selected results of research on green rocket propulsion performed at IoA, in which 98% hydrogen peroxide was used as oxidizer and monopropellant. Three types of rocket engines: monopropellant, liquid bipropellant and hybrid have been investigated and are still being developed.
Źródło:: Journal of KONES; 2016, 23, 1; 337-344
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Influence of the hull shape on the energy demand of a small inland vessel with hybrid propulsion
Autorzy:: Karczewski, Artur
Kunicka, Magdalena
Powiązania:: https://bibliotekanauki.pl/articles/1955606.pdf
Data publikacji:: 2021
Wydawca:: Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:: green shipping
hybrid
energy management
propulsion
hull shape optimization
Opis:: Recently, there has been a significant development of ecological propulsion systems, which is in line with the general trend of environmentally friendly “green shipping”. The main aim is to build a safe, low-energy passenger ship with a highly efficient, emission-free propulsion system. This can be achieved in a variety of ways. The article presents the main problems encountered by designers and constructors already at the stage of designing the unit. The research conducted made it possible to create a design with an effective shape of the hull, with the prospect of an energy-efficient and safe propulsion system with good manoeuvrability. The scope of the research included towing tank tests, recalculation of the results in full-scale objects and a prediction of the energy demand of the propulsion system. The results obtained were compared to indicate power supply variants depending on the hull shape.
Źródło:: Polish Maritime Research; 2021, 3; 35-43
1233-2585
Pojawia się w:: Polish Maritime Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Prototyp piasty wielobiegowej przekładniowej do ręcznych wózków inwalidzkich : wstępna analiza dynamiki ruchu wózka i biomechaniki ciała człowieka
Multi-speed gear hub prototype for manual wheelchairs : preliminary analysis of the dynamics of the trolley movement and biomechanics of the human body
Autorzy:: Wieczorek, Bartosz
Kukla, Mateusz
Warguła, Łukasz
Powiązania:: https://bibliotekanauki.pl/articles/315840.pdf
Data publikacji:: 2019
Wydawca:: Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:: wózek inwalidzki
napędzanie
mobilność
biomechanika napędzania
wheelchair
propulsion
mobility
biomechanics presses
Opis:: W artykule przeanalizowano dynamiczne aspekty napędzania wózka inwalidzkiego wyposażonego w ręczny napęd. Skupiono się zarówno na dynamice całego układu antropotechnicznego jak i na dynamice ciała człowieka. Ponad to na podstawie uzyskanych konkluzji zaproponowano dwa alternatywne rozwiązania techniczne ręcznych napędów wózków inwalidzkich.
The article analyzes the dynamic aspects of driving a wheelchair equipped with a manual drive. The focus was both on the dynamics of the entire anthropotechnical system as well as on the dynamics of the human body. Moreover, based on the obtained conclusions, two alternative technical solutions for manual wheelchair drives have been proposed.
Źródło:: Autobusy : technika, eksploatacja, systemy transportowe; 2019, 20, 1-2; 419-423
1509-5878
2450-7725
Pojawia się w:: Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:: Biblioteka Nauki

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