Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "engine development" wg kryterium: Wszystkie pola

  Lista filtrów
Wyrównaj
Wyświetlanie 1-15 z 60
Tytuł:
Development of research engine control unit using FPGA - based embedded control system
Autorzy:
Anand, B. P.
Saravanan, C. G.
Powiązania:
https://bibliotekanauki.pl/articles/246480.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
ECU
RECU
engine control algorithm
LabVIEW
virtual instrumentation
FPGA
fuel map
automotive sensor
Opis:
Though the Electronic Control Unit (ECU) systems are wide use in modern vehicles, they are manufactured by a few companies and supplied to engine manufacturers. Automotives with factory made ECUs designed to maximize the performance while minimize cost. However, factory made ECUs (FECU) have closed software and hardware. The control gain, lookup tables, and constants used in the algorithms are also calibrated for a particular engine design. Unlike the carburettor, these systems cannot be opened and studied under different operating conditions to determine their characteristics and how they influence the performance of an engine. They can be used as black boxes and work only at specified modes as determined by their electronic control unit (ECU) and more over the algorithms and their implementation are maintained as trade secret by the developers. In the research work, it often becomes necessary to study parameters like injection duration, injection timing, sensor responses etc. to ascertain their effects. Thus in such cases the factory made ECU supplied with the injection system cannot be used. The required need is fulfilled by developing a customized electronic controller that would be suitable for studying the variations at engine operating points. The project involved the development of a research ECU (RECU) using reconfigurable field programmable gate arrays (FPGA) based embedded control system for a four-stroke port fuel injected gasoline engine. A calibrated fuel map is generated for various operating points of the engine using virtual instrumentation (VI) based software while simulating functions of sensors. From the mapping, the fuel injection time and fuel delivery quantity is estimated for the required running conditions of the engine. The developed Research Electronic Control Unit (RECU) could reveal gasoline engine performance in particular for research-based applications as it involves frequent programme development and control implementations.
Źródło:
Journal of KONES; 2012, 19, 3; 9-18
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The possibilities and development of in-cylinder catalytic coating
Autorzy:
Andrych-Zalewska, M.
Powiązania:
https://bibliotekanauki.pl/articles/243435.pdf
Data publikacji:
2017
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
combustion engine
in-cylinder catalyst
exhaust emissions
Opis:
Due to the legal changes in the exhaust emission limits in the European Union meeting the new norms becomes more challenging for car manufacturers. The recent progress in the exhaust aftertreatment technology and commercially available aftertreatment systems. However, as the exhaust, systems become more and more complex the problem of high emissions in many engine-operating points that are not currently a part of the type approval tests remains. The article aims to address the limitations of the oxidation catalysts in current aftertreatment systems, mainly their light-off temperature, by investigating new options for in-cylinder catalysts. Placing the catalytic layer within the combustion chamber avoids a number of problems associated with these catalysts being a part of the aftertreatment system. Engine emission tests have been performed comparing the effects of using an in-cylinder Pt-Rh catalytic layer in relation to hydrocarbon and nitrogen oxides emissions. The viable methods of producing a catalytic layer on engine components along with the choice of components to use for catalytic surfaces have also been discussed.
Źródło:
Journal of KONES; 2017, 24, 3; 7-14
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optical diagnostics of the cycle-to-cycle variation in the kernel development and abnormal combustion: SI small engine
Autorzy:
Ballais, R.
Gallardo-Ruiz, J. M.
Merola, S. S.
Sementa, P.
Tornatore, C.
Powiązania:
https://bibliotekanauki.pl/articles/950078.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
optical diagnostics
cycle-to-cycle variation
flame kernel
abnormal combustion
SI engine
Opis:
The combustion stability and more in details the cyclic variability significantly influences the performance and the pollutant emissions of a spark ignition engine. In this work, an experimental research activity was carried out to investigate the influence of the different combustion phases on the cycle-to-cycle variation. In particular the flame kernel development and the fuel deposits burning were investigated by in-cylinder pressure measurements and optical investigations. Engine cycle resolved visualization was applied to characterize the spatial evolution of the flame front from the spark ignition until the exhaust phase. A numerical custom post-detection procedure was used to correlate the optical data with the pressure related parameters during the combustion process. The simultaneous use of optical diagnostics and pressure related analysis demonstrated the fundamental role of the first stage and late phase of the combustion on the spark ignition engine process. Flame kernel and diffusion controlled flame due to fuel deposits burning dominated the cyclic variability of in-cylinder combustion. The experiments were realized in a 250 cm3 single cylinder, port fuel injection, four-stroke spark ignition engine. The engine was optically accessible and it was equipped with the head, injection system and exhaust device of a commercial engine mounted on small motorcycles and scooters. Standard EURO IVgasoline was used.
Źródło:
Journal of KONES; 2010, 17, 2; 17-25
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Trends in automotive emissions legislation: impact on LD engine development, fuels, lubricants, and test methods – a global view, with a focus on WLTP and RDE regulations – Summary of the 6th International Exhaust Emissions Symposium (IEES)
Autorzy:
Bielaczyc, P.
Woodburn, J.
Powiązania:
https://bibliotekanauki.pl/articles/133409.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
global trends of exhaust emissions
emissions standards
IC engines
RDE
WLTP
WLTC
test methods
fuel development
hybrid vehicles
electric vehicles
światowe trendy emisji spalin
standardy emisji
silniki spalinowe
rozwój paliw
pojazdy hybrydowe
pojazdy mechaniczne
Opis:
Among the drivers influencing vehicular powertrain development, the field of vehicular exhaust emissions is experiencing wideranging and rapid changes. New emissions regulations such as Euro 6d and new test methods (RDE and WLTP) are the main challenges for the automotive industry caused by political, socioeconomic and technical factors. Air quality is very high on the political agenda and pressure remains to limit and reduce greenhouse gas emissions from the road transport sector. In addition to limits becoming increasingly stringent, the list of parameters subject to legal limits are slowly expanding – and, most importantly, these limits must be met under a wide range of conditions. A range of strategies are available to overcome these difficulties, which was explored during the 6th International Exhaust Emissions Symposium (IEES) hosted at BOSMAL in June 2018. This paper reports and summarises the topics of the 6th IEES and attempts a synthesis on the current status of the field of IC engines, hybrid powertrains and electric vehicles and what the coming years may hold for the automotive and fuel industries and other allied fields.
Źródło:
Combustion Engines; 2018, 57, 3; 56-65
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Możliwości rozwoju silników spalinowych z uwzględnieniem strategii downsizingu i rightsizingu
Possibilities of development of internal combustion engines, including downsizing and rightsizing strategy
Autorzy:
Bor, Mateusz
Idzior, Marek
Karpiuk, Wojciech
Smolec, Rafał
Powiązania:
https://bibliotekanauki.pl/articles/313869.pdf
Data publikacji:
2019
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
downsizing
rightsizing
silnik spalinowy
combustion engine
Opis:
W artykule omówione zostały kierunki rozwoju ówczesnych silników spalinowych, wykorzystywanych w pojazdach samochodowych. Obowiązujące przepisy dotyczące dopuszczalnej emisji związków szkodliwych i toksycznych wymuszają na producentach pojazdów systematyczne zmniejszanie ich masy oraz polepszanie parametrów ekologiczno-ekonomicznych silników, w celu spełnienia rygorystycznych wymagań. Korzystne parametry użytkowe uzyskuje się poprzez wykorzystanie w konstruowaniu silników strategii downsizingu oraz rightsizingu. W ramach artykułu przedstawione zostały obie koncepcje konstruowania. Określono najważniejsze cechy silników downsizingowych i rightsizingowych, ich zalety oraz wady. Opisany został również kierunek dalszego rozwoju silników spalinowych, który cechuje wykorzystanie obu strategii projektowania.
The article discusses the development directions of the then internal combustion engines used in automotive vehicles. The regulations in force regarding permissible emission of harmful and toxic compounds force the vehicle manufacturers to systematically reduce their mass and improve the ecological and economic parameters of engines in order to meet stringent requirements. Favorable application parameters are obtained through the use of downsizing strategies and rightsisers in the construction of motors. The article presents both conceptional concepts. The most important features of downsizing and rightsizing engines, their advantages and disadvantages were determined. There is also described the direction of further development of internal combustion engines, which is characterized by the use of both design strategies.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2019, 20, 6; 155-160
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of low temperature plasma nox control system for marine diesel engine
Autorzy:
Borkowski, T.
Myśków, J.
Hołub, M.
Kalisiak, S.
Powiązania:
https://bibliotekanauki.pl/articles/243384.pdf
Data publikacji:
2007
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
marine diesel engine
exhaust emission gas treatment
low temperature plasma reactor
Opis:
The control of nox emissions from marine engines proves a challenge. Diesel engine manufacturers have been investigating a variety of methods with aim of reducing nox emissions. Currently, the plasma technology is undergoing rapid development in application to diesel engine exhausts. A combination of non-thermal plasma with catalysts can be referred to plasma assisted catalysts technology. This paper briefly describes research efforts aimed at non-thermal plasma reactor development for ship use with primary focus on NO oxidation condition. The part scale plasma reactor models have been designed and manufactured for the purpose of this trial. Exhaust emission plasma after-treatment module was fitted on exhaust outlet path of the marine test bed engine for fractional exhaust gas stream examination. Subsequently, the comprehensive series of trials were performed to assess the exhaust flow properties of the main exhaust channel and plasma reactor by-pass duct. Emission measurements were carried out on engine at steady-state operation. The NO reaction activity was a major task of the experiment and throughout the measurements, the engine outlet nox levels (NO and NO2) were monitored with simultaneous NO, NO2, N2O level recording after NTP reactor.
Źródło:
Journal of KONES; 2007, 14, 3; 91-99
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Gas exchange in valved two-stroke SI engine
Autorzy:
Buczek, K.
Mitianiec, W.
Powiązania:
https://bibliotekanauki.pl/articles/245914.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
transport
engine development
two-stroke engine
boosting
Opis:
The paper describes the work of high speed charged spark ignition overhead poppet valve two-stroke engine, which enables to achieve higher total efficiency and exhaust gas emission comparable to four-stroke engines. The work of such engines is possible by proper choice ofvalve timings, geometrical parameters of inlet, outlet ducts and charge pressure. The engine has to be equipped with direct fuel injection system enabling lower emission of pollutants. The work is based on theoretical considerations performed in GT-Power in previous authors' research and carried out in CFD code (KIVA 3 V) for different engine configurations. The initial results included in the paper show influence of inlet port geometry and charge pressure on engine scavenging process. Additionally, optimum fuel spray injector position was considered in order to obtain proper fuel vaporization and avoid significant wall-wetting. The simulation results show that the nitrogen oxides arę considerably reduced in comparison to four-stroke engines because ofhigher internal exhaust gas recirculation. The innovation of this proposal is applying of poppet intake and exhaust valves with turbocharging in the two-stroke engine and obtaining a significant downsizing effect. The conclusion shows the possibilities of proper gas exchange process in this type of two-stroke engine and thus, the feasibility of its application as a power unii for transportation means with higher total efficiency than traditional engines with possible change of engine work in two modes: two- and four-stroke cycles.
Źródło:
Journal of KONES; 2010, 17, 1; 73-80
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The development of an explosion protection system in the starting air manifold of a high power engine
Autorzy:
Chybowski, Leszek
Kozienko, Damian
Powiązania:
https://bibliotekanauki.pl/articles/88667.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
explosion protection
leakage detector for starting valves
machine diagnostics
engine explosions
active monitoring system
zabezpieczenia przeciwwybuchowe
diagnostyka maszyn
wybuchy silnika
aktywny system monitorowania
Opis:
In this paper, the authors have discussed the subject of fire and explosion hazards during the operation of a modern ship's high-power internal combustion engines. The causes of the occurrence of and the methods of preventing explosions in the starting manifolds of modern piston combustion engines equipped with a pneumatic starting system, with starting valves on the cylinder heads, have been specified. The concept of an active system for monitoring the technical condition of the starting valves has been presented in order to quickly diagnose leakages and reduce the risk of explosion. A conceptual design of a prototype of a non-invasive, new generation leak detector for starting valves and its technical design have been presented. Exemplary implementations of the prototype detector have been shown and its selected functionalities have been discussed. This paper has ended with an assessment of the possibility of further development and the applications of this device.
Źródło:
System Safety : Human - Technical Facility - Environment; 2019, 1, 1; 26-34
2657-5450
Pojawia się w:
System Safety : Human - Technical Facility - Environment
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of breakup models in simulation of spray development in direct injection SI engine
Autorzy:
Ćwikowski, P.
Jaworski, P.
Teodorczyk, A.
Powiązania:
https://bibliotekanauki.pl/articles/247550.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
direct injection
combustion
gasoline
breakup models
SGDI
Opis:
Nowadays the wide range of spark ignition (SI) engines with spray guided direct injection (SGDI) is in production. Spray development is playing a major role in advanced engine design with three-dimensional computational fluid dynamics (CFD). Nevertheless still there is a need for improvement in CFD injection simulations because of the high pressure injection. The high pressure injection influences the drop breakup, coalescence and evaporation which are critical for proper representation of simulated phenomenon. Computer codes, like FIRE, give a possibility to simulate the process of injection with various types of breakup models. In spite of the importance of atomization, mechanisms of breakup are still not well understood. To obtain better understanding of breakup models simulations have been performed for the engine combustion chamber with inlet andoutlet system and SGDI strategy. For that the model was at first constructed and then imported to the Fire code. After meshing process the model has 2 million cells. The engine is not boosted and as fuel the ethanol is used. The calculations were performedfor 3500 rpm. The influence of different breakup regimes on the spray shape is presented in this study. Comparison is made for Wave, TAB (Taylor Analogy Breakup) and Reitz-Diwkar breakup models.
Źródło:
Journal of KONES; 2010, 17, 4; 123-130
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Stosować czy nie stosować? Oto jest pytanie. Deskryptory Biblioteki Narodowej jako propozycja zmian w opracowaniu zbiorów w opinii bibliotek państwowych wyższych szkół zawodowych w Polsce
To apply or not to apply? That is the question. Descriptors of the National Library as a proposal of changes in the development of sets in the opinion of the libraries of Higher Vocational Schools in Poland
Autorzy:
Cyran, Katarzyna
Borkowicz, Cezary
Kowalewski, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/1182053.pdf
Data publikacji:
2019-10-23
Wydawca:
Akademia Bialska Nauk Stosowanych im. Jana Pawła II w Białej Podlaskiej
Tematy:
Deskryptory Biblioteki Narodowej
standardy RDA
wyszukiwarka fasetowa
biblioteki państwowych wyższych szkół zawodowych
katalogowanie
Decriptors of the National Library
standards of RDA
faceted search engine
Libraries of the Higher Vocational Schools
cataloguing
Opis:
Wstęp. Celem artykułu jest zaprezentowanie opinii katalogerów pracujących w bibliotekach państwowych wyższych szkół zawodowych w Polsce na temat deskryptorów Biblioteki Narodowej (dBN), przedstawienie danych dotyczących stosowania wybranych standardów Resource Description & Access (RDA) w procesie opracowania zbiorów oraz informacji na temat systemu bibliotecznego. Materiał i metody. Badania przeprowadzono w maju i czerwcu 2018 roku. Dane zostały przygotowane na podstawie ankiety, wysłanej do 33 bibliotek państwowych wyższych szkół zawodowych w Polsce. Zarejestrowano odpowiedzi z 14 instytucji (42%). Wyniki. Większość bibliotek, które stosowały JHP BN stosuje obecnie dBN i ma pozytywną opinię na ich temat. Przeważająca część stosuje wybrane standardy RDA. Wyszukiwanie w katalogach OPAC tylko w niewielu przypadkach opiera się na wyszukiwaniu fasetowym, nie wszystkie systemy dają taką możliwość, a wymiana oprogramowania wiąże się z dużymi nakładami finansowymi. Wnioski. Uzyskane wyniki pokazują, że biblioteki, które odpowiedziały na ankietę, są otwarte na zmiany, chętnie stosują nowe standardy i starają się sprostać potrzebom odwiedzających je użytkowników.
Introduction. The aim of this article is to present the opinion of catalogue specialists working in state libraries of Higher Vocational Schools (HVS) in Poland about descriptors of the National Library (dNL), presentation of data relating to the application of selected standards of Resource Description & Access (RDA) in the process of development of sets and information about the library system. Material and methods. The studies were conducted in May and June of 2018. Data were prepared on the basis of a survey sent to 33 libraries of the Higher Vocational Schools in Poland. The answers were registered from 14 institutions (42%). Results. The majority of the libraries which applied JHP BN currently apply dBN and have a positive opinion about them. The majority of them apply selected standards RDA. Search in the OPAC catalogues only in several cases is based on faceted search, whilst not all systems give such opportunity and the exchange of software carries the burden of significant finance means. Conclusions. The results show that libraries, which replied to the survey are open to changes, willingly applying new standards and making efforts to meet the needs of users visiting them.
Źródło:
Rozprawy Społeczne; 2019, 13, 2; 97-109
2081-6081
Pojawia się w:
Rozprawy Społeczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dwuzakresowy system doładowania zakresowego z dwiema turbosprężarkami różnej wielkości. Możliwości rozwoju
Two-phase sequential turbocharging system with two unequal-size turbochargers. Possibilities for development
Autorzy:
Danilecki, K.
Eliasz, J
Powiązania:
https://bibliotekanauki.pl/articles/134187.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
silnik o zapłonie samoczynnym
doładowanie dwuzakresowe
symulacje numeryczne
diesel engine
two-phase supercharging
numerical simulations
Opis:
Zastosowanie zasady dwuzakresowej regulacji doładowania jest wskazane zarówno w silnikach o zapłonie samoczynnym samochodów ciężarowych, jak i w samochodach osobowych. Wyniki badań doświadczalnych i symulacji numerycznych pokazują, że dwuzakresowy system doładowania zakresowego z dwoma turbosprężarki różnej wielkości jest skuteczną metodą zwiększenia koncentracji mocy oraz momentu obrotowego przy małych prędkościach obrotowych, a także poprawy właściwości dynamicznych oraz zmniejszenia zużycia paliwa w zakresie małych prędkości obrotowych. Jednak osiągnięcie takich korzyści wymaga odpowiedniego dopasowania do silnika dwóch różnych turbosprężarek i określenia granicy ich przełączania, a odpowiednie rozwiązania tego problemu są omawiane w pracy.
The principle of the two-phase variable supercharging system applied to heavy-duty automotive diesel engines and car diesel engines is indicated. The experimental and numerical simulations results show that twophase sequential turbocharging system with two unequal-size turbochargers is effective to improve performance per liter and torque output at low speed, and improve acceleration performance, fuel consumption at low speed. However, achieving such benefits requires proper matching of the two unequal-size turbochargers to the engine and the steady switching boundary, and corresponding solutions are discussed.
Źródło:
Combustion Engines; 2015, 54, 3; 1060-1064
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Game Engine Conventions and Games that Challenge them: Subverting Conventions as Metacommentary
Autorzy:
Fiadotau, Mikhail
Powiązania:
https://bibliotekanauki.pl/articles/682891.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Łódzki. Wydawnictwo Uniwersytetu Łódzkiego
Tematy:
game engine
game development
hobbyist games
participatory culture
platform studies
creativity
innovation
autoethnography
Opis:
Consumer-grade game engines such as Multimedia Fusion and RPG Maker have dramatically extended the reach of digital games as a medium. They have also spawned online communities, where conventions and canons of using these tools have evolved. These partly stem from the functional constraints of the game engines themselves and are institutionalized through manuals, examples, tutorials, and games made with them. However, some members of game engine communities actively seek to challenge these conventions by experimenting with the engines and finding ingenious ways to put them to unexpected uses. Such experiments can be regarded as a form of metacommentary on the engines’ capabilities and limitations. While arguably impractical and inefficient, they enrich the scope of what can be done with the engine and can contribute to its further development.
Źródło:
Replay. The Polish Journal of Game Studies; 2016, 3, 1; 47-65
2391-8551
2449-8394
Pojawia się w:
Replay. The Polish Journal of Game Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Construction of an air intake system model for F-100-PW-229 engine in F-16 aircraft for intake vortex development analysis
Budowa siatki do wlotu F-16. Analiza przepływowa
Autorzy:
Frant, M.
Kozakiewicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/212472.pdf
Data publikacji:
2011
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:
analiza wlotu powietrza
analiza przepływowa
siatka do wlotu F-16
numerical fluid mechanics
intake vortex
aerodynamics
Opis:
In this paper selected problems on building complex object (virtual model of intake conduit for the engine of F-16 aircraft) for the needs of numerical analysis, including numerical analysis of intake vortex phenomenon, are presented. The process of discretization in selected problem was described and few hints and guidelines for preparing and performing the process of computational area discretization were contained. In the next section test results were presented with the purpose of examining the accurateness of object’s shape and selected computational grid, chosen boundary conditions and algorithm of solution. This paper is an introduction to conducting wider analysis of a dangerous, from the perspective of engine’s life, phenomenon which is the air intake vortex development on F-16 aircraft.
W artykule zaprezentowano metodykę budowy modelu parametrycznego na potrzeby analizy drgań własnych elementów lotniczego silnika turbinowego. Omówiono proces modelowania w ujęciu systemowym w zastosowaniu do procesu optymalizacji łopatki turbiny. Przedstawiono osobliwości projektowania lotniczego silnika turbinowego i jego zespołów. Opracowano algorytmy wyboru punktów z danych pomiarowych do utworzenia wzorca. Przeprowadzono dyskusję doboru krzywych do parametrycznego modelowania z uwzględnieniem wejść do procesu optymalizacji odwzorowania powierzchni bazując na technice inżynierii odwrotnej. Przedstawiono proces odwzorowania geometrii od etapu wykonania precyzyjnych pomiarów, identyfikacji danych, weryfikacji krzywych, aż do utworzenia bryły modelowanego obiektu. W pracy zawarto założenia opracowanych przez autorów i zastosowanych algorytmów modelowania elementów struktur lotniczych.
Źródło:
Prace Instytutu Lotnictwa; 2011, 8 (217); 39-49
0509-6669
2300-5408
Pojawia się w:
Prace Instytutu Lotnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optical diagnostics of the cyclic variation in the kernel development and abnormal combustion: SI boosted engine
Autorzy:
Gallardo-Ruiz, J. M.
Ballais, R.
Merola, S. S.
Sementa, P.
Tornatore, C.
Powiązania:
https://bibliotekanauki.pl/articles/246898.pdf
Data publikacji:
2010
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
optical diagnostics
cycle-to-cycle variation
flame kernel
abnormal combustion
SI boosted engine
Opis:
The combustion stability of a spark ignition engine significantly influences its performances. The cyclic variation is generally evaluated by the fluctuation of in-cylinder peak pressure which changes in both magnitude and position measured from TDC. In this work the cyclic variation of combustion process were analysed as function of crank angles. The different SI engine process phases were investigated. The pressure related data were correlated with cycle resolved visualization measurements. The cycle resolved digital imaging was applied to follow the kernel inception and growth and to study the flame front propagation until the exhaust phase. A custom numerical post-detection procedure was applied to correlate the optical data from the integral luminous signal measured in the combustion chamber with the pressure related parameters .The flame kernel and the abnormal combustion due to the fuel deposits burning resulted particular relevant for the cycle-to-cycle variations. Optical measurements outlined better than pressure related analysis the role of the early andfinal stages of the combustion process. The experiments were performed in a 400 cm3 single cylinder, port fuel injection, four-stroke spark ignition engine. The engine was optical accessible with the same geometrical parameters as a 1600 cm3 passenger car engine. The head and the injection system of a commercial engine mounted on a passenger car were used. Standard EURO IV gasoline was used
Źródło:
Journal of KONES; 2010, 17, 2; 103-111
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of turbofan engine design modification to add inter-turbine combustor
Autorzy:
Jakubowski, R.
Powiązania:
https://bibliotekanauki.pl/articles/244764.pdf
Data publikacji:
2015
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
jet engine
turbofan engine
turbofan engine design
airplane engine development
inter turbine combustor turbofan
Opis:
An inter turbine combustion is one of modern direction of turbofan engine cycle modification. It is possible to reduce gas temperature in high-pressure turbine inlet section and reduce NOX emission by an additional combustor placed between high and low pressure turbines. The analysis of engine cycle modification and its performance are a scope of many scientific investigations, but it is not any work about engine dimension change due to cycle modification. By these way problems of two combustor engine components and dimensions, change with comparison to conventional turbofan engine is a goal of this work. The structure of a turbofan engine with inter turbine combustor is shown and results of evaluation temperature and pressure in specified engine cut sections are presented and discussed. Then the gas density is calculated and by mass continuity equation application, the specified cross section areas are determined. The results of two-combustor turbofan engine are compared with conventional high bypass turbofan engine. The comparison of engines parameters allow to predict how engine components should be modified in two-combustor turbofan when the base of modification is classic turbofan engine. The analyse contain determination of compressor and turbine stage numbers, prediction of areas of cross section and diameters in specified engine sections and overall engine axial dimensions. The results are used to formulate conclusion about the turbofan engine structure modification by additional combustor implementation between turbines.
Źródło:
Journal of KONES; 2015, 22, 3; 75-82
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 60

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies