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    Tytuł:
    Analysis of thermodynamical parameters of combustion engine working cycle
    Autorzy:
    Siemińska - Jankowska, B.
    Ambrozik, A.
    Jankowski, A.
    Ślęzak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/246372.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    combustion engine
    engine thermodynamics
    engine working cycle
    Opis:
    Thermodynamics systems may be classified as isolated, closed, or open based on the possible transfer of mass and energy across the system boundaries. An isolated system is one that is not influenced in any way by the surroundings. This means that no energy in the form of heat or work may cross the boundary of the system. In addition, no mass may cross the boundary of the system. A thermodynamic system is defined as a quantity of matter of fixed mass and identity upon which attention is focused for study. A closed system has no transfer of mass with its surroundings, but may have a transfer of energy (either heat or work) with its surroundings. An open system is one that may have a transfer of both mass and energy with its surroundings. Described system being an object of the paper is an open system for some phenomena. An object the paper is the thermodynamical analysis of the filling process of the cylinder which occurs in calculated period from the percussion cap of the position the piston at TDC to it position at BDC, at constant average value of the pressure in the cylinder. During durations of the filling process of the cylinder, dirt of the working charge combustion products are not taken into account. One accepts that the quantity of the working charge in the established point placed on the compression line by piston BDC is equal quantity of the working charge in the end point of the filling process, answering to the start point of the real compression process. The state of the working charge in cylinder described is four parameters: a pressure, a temperature, quantity moles of the working charge and its volume. For appointment those parameters, earlier worked out dependences are put-upon.
    Źródło:
    Journal of KONES; 2007, 14, 3; 563-572
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Próba zastosowania analizy falkowej do oceny wskaźników cyklu pracy silnika o ZS
    Attempt at wavelet analysis application to the assessment of self-ignition engine working cycle indicators
    Autorzy:
    Ambrozik, A.
    Kurczyński, D.
    Łagowski, P.
    Ambrozik, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/329208.pdf
    Data publikacji:
    2005
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    silniki spalinowe
    diagnostyka
    wykres indykatorowy
    wydzielanie ciepła
    analiza falkowa
    combustion engines
    diagnostics
    indicator diagram
    heat release
    wavelet analysis
    Opis:
    W artykule podjęto próbę zastosowania prostych równań analizy falkowej do oceny wskaźników cyklu pracy silnika o zapłonie samoczynnym. Analizie poddano wykresy indykatorowe silnika AD3.152 pracującego wg zewnętrznej charakterystyki prędkościowej dla prędkości obrotowej odpowiadającej maksymalnemu momentowi obrotowemu n=1400obr/min i prędkości mocy nominalnej n=2000obr/min. W pracy przedstawiono rzeczywiste wykresy indykatorowe i po odfiltrowaniu zakłóceń. W artykule omówiono wpływ odfiltrowania przebiegu ciśnienia w cylindrze na charakterystyki wydzielania ciepła podczas procesu spalania.
    The paper makes an attempt at applying simple equations of wavelet analysis to the assessment of self-ignition engine working cycle indicators. AD3.152 engine indicator diagrams are analysed. The engine operated in external speed characteristics regime for the rotational speed corresponding to the maximum torque n= 1400 rotations/min and power rating speed n=2000 rotations/min. Both real indicator diagrams and those obtained after interference filtration are presented in the paper. The impact of the filtration of pressure changes in the cylinder on heat release characteristics in combustion process is discussed.
    Źródło:
    Diagnostyka; 2005, 33; 9-12
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The hybrid concept of turboshaft engine working according to Humphrey cycle dedicated to variety power demand - CFD analysis
    Autorzy:
    Tarnawski, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/24202460.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    pressure gain combustion
    Humphrey cycle
    turbine engine
    CFD analysis
    valve timing system
    isochoric combustion
    engine energy efficiency
    sealing system
    spalanie powodujące wzrost ciśnienia
    cykl Humphreya
    silnik turbinowy
    analiza CFD
    układ rozrządu
    spalanie izochoryczne
    sprawność energetyczna silnika
    system uszczelniający
    Opis:
    The paper presents a new concept of the turbine engine in the area of pressure gain combustion (PGE). The engine works according to Humphrey’s cycle. Minor modification in construction has allowed power generation of 500 kW, 700 kW, 1000 kW, and 1800 kW. The concept successfully resolved the challenges related to the temporary opening and closing of the combustion chamber. The presented valve timing system has ensured effective gas flow and what stands behind it, an effective process of conversion of a high-pressure gas impulse into mechanical energy. Rotating combustion chambers enabled the application of an effective sealing system. The concept characterizes simple construction and potentially low power-to-weight coefficient. The CFD numerical analysis of the presented engine concept showed very promising effective efficiency and low specific fuel consumption.
    Źródło:
    Combustion Engines; 2023, 62, 2; 129--136
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rotating combustion chambers as a key feature of effective timing of turbine engine working according to Humphrey cycle – CFD analysis
    Autorzy:
    Tarnawski, Piotr
    Ostapski, Wiesław
    Powiązania:
    https://bibliotekanauki.pl/articles/2173712.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    pressure gain combustion
    Humphrey cycle
    turbine engine
    CFD analysis
    valve timing system
    isochoric combustion
    engine energy efficiency
    sealing system
    ciśnienie spalania
    cykl Humphreya
    silnik turbinowy
    analiza CFD
    układ rozrządu
    spalanie izochoryczne
    sprawność energetyczna silnika
    system uszczelniający
    Opis:
    The paper presents a concept of a new turbine engine with the use of rotating isochoric combustion chambers. In contrast to previously analyzed authors’ engine concepts, here rotating combustion chambers were used as a valve timing system. As a result, several practical challenges could be overcome. An effective ceramic sealing system could be applied to the rotating combustion chambers. It can assure full tightness regardless of thermal conditions and related deformations. The segment sealing elements working with ceramic counter-surface can work as self-alignment because of the centrifugal force acting on them. The isochoric combustion process, gas expansion, and moment generation were analyzed using the CFD tool (computational fluid dynamics). The investigated engine concept is characterized by big energy efficiency and simple construction. Finally, further improvements in engine performance are discussed.
    Źródło:
    Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 5; art. no. e143100
    0239-7528
    Pojawia się w:
    Bulletin of the Polish Academy of Sciences. Technical Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of usefulness of mass flow meter to the survey of SI engine cylinder filling in one working cycle
    Autorzy:
    Wołczyński, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/133140.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    SI engine
    fill survey
    mass flow meter
    phase of fill survey
    silnik ZI
    miernik przepływu masy
    Opis:
    The article presents the technique of the usage of mass flow meter to the fill survey of a cylinder in the multi cylinder engine, in each working cycles. The result of correctness of the survey was grounded on the comparison of air masses: the one registered with the usage of the flow meter and the other one calculated on the basis of mixture parameters. The flow meter was located in the consolidated part of suction system in front of the throttle valve. Mixture parameters were determined on the basis of time of fuel injection and measured lzm factor of burnt mixture. The studies were carried out in the whole operating range of engine. Discrepancies between the measured and calculated values for 93% of all of the cycles fall within the ambit of ±3% of the actual value.
    Źródło:
    Combustion Engines; 2017, 56, 2; 187-192
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of parameters of the engine working in two thermodynamic cycles
    Autorzy:
    Cygnar, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/247920.pdf
    Data publikacji:
    2012
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    two cycle engine
    two fuel injection systems
    Opis:
    The article presents an experimental research conducted on a test engine based on a driving unit with a spark ignition Toyota Yaris 1,300 cm 3, equipped with two systems of power supply i.e.: fundamental and ignition. Two methods of initiating the combustion process were applied in the engine i.e.: from spark ignition and after it has turned off - the combustion is initiated by means of the injection of the ignition dose. The fundamental task of The adaptation of two power supply systems for a combustion engine is the possibility of work in two thermodynamic circulations, which permits better conditions for creating the fuel-air mixture, which translates directly into significant improvement of the engine's working parameters accuracy, such as general efficiency as well as the individual fuel consumption. The experimental research presented in this work consist of designing and construction of an engine with two injection systems with a controller managing the automatic change of the work mode, as well as the execution of the analysis of the chosen work parameters in a two-cycle engine i.e.: - comparative research on the engine's work performance, when it works with a spark ignition and when it is initiated with the autoignition of the ignition dose, - determining the increase in the general efficiency of the two-cycle engine, working with the injection of the ignition dose, in comparison with the conventional power supply system with the initiation of the combustion process from an electric discharge between the spark plug electrodes. Applying the two-cycle engine with two power supply systems with an automatic spark ignition presented in this article, along with the electronically controlled system of changing the ignition method, increases the general efficiency in the total range of rotational speed, compared with the conventional engines with the automatic spark ignition
    Źródło:
    Journal of KONES; 2012, 19, 2; 95-102
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Theoretical and real working cycle of four stroke piston engine
    Autorzy:
    Ambrozik, A.
    Jankowski, A.
    Slezak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/243165.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    combustion engine
    thermodynamics
    working cycle
    cylinder pressure
    Opis:
    The most important problems concerning analyses of generalized computational thermodynamical working cycle of the four-stroke combustion engine are result of the identification of real indicating diagram. The analysis of working cycle of the four-stroke combustion engine is realized from point of view heat efficiency, the average theoretical cycle pressure, as well as of the influence of the organization working cycle on the value of the maximum pressure in the cylinder of a combustion engine. A novel mathematical model reflecting elementary processes occurring in the cylinder of a combustion engine and connected with it intake and exhaust systems of engine were proposed. Thermodynamical working cycles of four-stroke piston engines, theoretical working cycle of a four-stroke piston engine, thermal efficiency of the theoretical thermodynamic generalised engine work cycle, mean theoretical pressure of the generalised thermodynamic work cycle of a combustion engine, maximum pressure of the theoretical thermodynamic work cycle of a combustion engine, comparative working cycles of piston engines, real working cycle of four-stroke piston engines are presented In het paper. The methods of analyses and calculations referring these engines work cycles were presented. These method show advisability and needs of using them to theoretical calculations and analyses of real work cycles. Generalized engine work cycle was proposed.
    Źródło:
    Journal of KONES; 2007, 14, 2; 9-18
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of load parameters on unrepeatability of working cycles at low SI engine speed
    Wpływ parametrów obciążenia na niepowtarzalność cykli pracy przy niskiej prędkości obrotowej silnika spalinowego ZI
    Autorzy:
    Przybyła, G.
    Postrzednik, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/242784.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    silnik spalinowy
    indykacja
    ciśnienie maksymalne
    niepowtarzalność cykli
    funkcja gęstości
    funkcja rozkładu
    obieg reprezentatywny
    in-cylinder pressure
    combustion engine
    ideal cycle
    density function
    distribution function
    Opis:
    During investigation concerning internal processes taking place in internal combustion engine, the basic measurement is in-cylinder pressure signal. Obtained results were used as input data for calculating basic parameters of working cycle (e. g. function of fuel combustion, function of reach of torque, the temperature function during combustion). The main problem during the interpretation of obtained results, are minor differences between the functions of pressures existing in following working cycles of the engine. The parameters of following working cycle (e.g. stability of working point, engine speed r0 , torque Mo,e) depend on processes taking place in combustion chamber and stability of set point values. The one of the most important parameter deciding about differences between following working cycles are the loss of the air-fuel mixture. Mentioned processes cause problems with proper creating of reference cycle. In this paper results concerning indication researches of combustion engine with spark ignition have been presented. The indicator functions of following cycles were analyzed. Obtained results were used to determination define the influence of the engine parameters on the maximum pressure in collected pressure functions. Over 200 following working cycles were analyzed. The low engine speed (r0 =1000 rpm) was constant. The torque was changed from idle run up to maximum value. All results were analyzed statistically. The function of density and distribution of maximal pressure in cylinder of engine were determined. Besides an index of maximum indication pressure unrepeatability was determined on the basis of measurement data.
    W badaniach procesów wewnętrznych (metoda indykacji) zachodzących w silnikach spalinowych, podstawowym sygnałem mierzonym jest chwilowa wartość ciśnienia w cylindrze silnika. Zasadniczy problem podczas interpretacji uzyskanych wyników stanowią znaczne różnice przebiegów ciśnień, w następujących po sobie cyklach pracy silnika spalinowego (głównie w silniku ZI). Niepowtarzalność cykli powoduje istotne trudności z wyznaczaniem tzw. obiegu reprezentatywnego. W artykule zaprezentowano wyniki badań indykacyjnych silnika spalinowego z zapłonem iskrowym, pracującego przy niskiej prędkości obrotowej. Szczegółowej analizie poddano wykresy indykatorowe w kolejnych następujących po sobie cyklach pracy. Uzyskane wyniki pomiarowe zostały wykorzystane do określenia wpływu parametrów obciążenia silnika spalinowego (Mo, r0), na wartość ciśnienia maksymalnego w zebranych wykresach indykatorowych. Analizie poddano 240 następujących po sobie, cykli roboczych w wybranych punktach pracy silnika. Wykorzystano wskaźnik niepowtarzalności cykli, oparty o wartość ciśnienia maksymalnego w danym cyklu, przy uwzględnieniu także jego wartości średniej. Całość wyników poddano niezbędnej obróbce statystycznej; wyznaczone zostały funkcje gęstości oraz funkcje rozkładu ciśnienia maksymalnego w cylindrze silnika. Ponadto na podstawie zebranych danych pomiarowych wyznaczono wskaźnik niepowtarzalności maksymalnego ciśnienia indykowanego. Zaprezentowane wyniki stanowią rezultaty drugiego etapu badań w odniesieniu do pracy [6].
    Źródło:
    Journal of KONES; 2007, 14, 4; 365-372
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Proposal of a piston engine with close thermal cycle of working medium
    Autorzy:
    Mitianiec, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/242513.pdf
    Data publikacji:
    2013
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    transport
    combustion engine
    thermal cycles
    closed system
    Opis:
    Ecological aspects and utilization of biomass as a fuel leads to applying of a closed work cycle in the piston engine. It forces usually to delivering of heat to working medium through a heat exchanger. The heat may get from any type of fuel in an external combustion chamber, which allows on precisely control of combustion process. The paper describes a new conception of the engine operating in two-stroke cycle with working medium being in the close system, the best with the perfect gas as argon or helium. The delivering process of working medium with high temperature from the heat exchanger takes place through the inlet valve during a few dozen degrees of CA rotation in piston position at TDC. Expansion stroke takes place until outlet valve opens shortly BBDC. The outlet period from the cylinder follows almost at constant pressure and at low temperature to an adiabatic chamber, from where the working medium is compressed by an adiabatic compressor to pressure near pressure being in the heat exchanger. The engine works in two-stroke cycle and enables to get low temperature and pressure as early as BDC through a long time of opening of the outlet valve. The paper presents the ideological scheme of the engine system and theoretical thermal cycle. On this basis one presents the theoretical description of the individual thermodynamic processes with determination of thermal parameters of the characteristic points of the cycle. This article determines also the thermal efficiency of such closed cycle. The presented engine may have a practical applying as a stationary engine in energetic systems, where as fuel may be biomass, which globally influences on decreasing of CO2 and NOx by temperature control of the combustion process
    Źródło:
    Journal of KONES; 2013, 20, 1; 209-217
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The identification of model parameters for a semi-empirical model of working process in the compression-ignition engine
    Autorzy:
    Brzozowski, K.
    Nowakowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/243901.pdf
    Data publikacji:
    2010
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    modelling
    working cycle
    artificial intelligence
    Opis:
    The paper concerns the identification process applied for a semi-empirical model of working process in the CI engine. The identification is based on pressure courses in the cylinder recorded during the experimental measurements on the test stand and is performed for estimation of values of the model parameters. Appropriate estimated values of the model parameters ensure minimization of the difference between measured and modelled pressure courses in the cylinder. The identification process can be divided into two stages. The first stage concerns identification of discrete values of the model parameters for a set of discrete engine operating conditions. The task of discrete identification is formulated as a dynamic optimisation task which is sohed using a genetic algorithm. The accuracy of the identification process is evaluated by comparison of measured and calculated values of main parameters which characterize the working cycle such as: the mean indicated pressure, thermal efficiency, the mean indicated pressure in working part of the cycle, maximal pressure of the cycle, the mass of the medium in the cylinder and the crankshaft angle for which the maximal pressure occurred. The second stage concerns generalization of the results for any technically possible engine operating conditions which is sohed by means of approximation. Feed-forward multilayer artificial neural networks are usedfor the approximation. The accuracy of the identification and some examples of verification of the model predictions are presented as well.
    Źródło:
    Journal of KONES; 2010, 17, 3; 41-48
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of a possible application of a small power plant in the Organic Rankine Cycle, which apply waste heat from a combustion engine
    Autorzy:
    Żabski, J.
    Gumkowski, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1191839.pdf
    Data publikacji:
    2018
    Wydawca:
    Gdańska Szkoła Wyższa
    Tematy:
    Organic Rankine Cycle
    working fluids
    waste heat
    Opis:
    Some considerations on the waste heat treatment, heat and power combined generation and principles of the Organic Rankine Cycle and its application are produced. A thermodynamic screening of eight working fluids for Organic Rankine Cycle (ORC) was carried out. All investigated agents were single component fluids. The considered ORC systems operated at the upper temperature in the range Tmax=146-185°C and the lower one Tmin=27-37°C. The highest pressure in the cycles equalled pmax=3500 kPa and pmin=85 kPa. The cycles were run at subcritical pressures and the saturated vapour line was of the overhanging type in all cases. Heat regeneration was not considered in this paper. The heat source for the ORC system was heated air exhausted from the cooling system of an opposed-piston engine. The temperature of this heat at the inlet to ORC was equal to Th,in=230°C. Air was also the heat sink for the ORC with the inlet temperature Tcold,in=20°C. The power output of the ORC, neglecting electric generator efficiency, was kept in the range N=10-11 kW. Calculated thermal efficiencies h held values between 0.121 and 0.164.
    Źródło:
    Eco-Energetics: technologies, environment, law and economy; 2018, 1; 127--135
    2657-5922
    2657-7674
    Pojawia się w:
    Eco-Energetics: technologies, environment, law and economy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimizacija sostava smesi pri regulirovanii moshhnosti benzinovogo dvigatelja metodom otkljuchenija rabochikh ciklov
    Optimization of fuel mixture in regulation of power of gasoline engine by method of cut-off of working cycles
    Autorzy:
    Gerasimchuk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/76641.pdf
    Data publikacji:
    2014
    Wydawca:
    Komisja Motoryzacji i Energetyki Rolnictwa
    Tematy:
    petrol engine
    engine capacity
    work cycle
    switching
    exhaust gas
    electromagnetic valve
    mathematical model
    nitrogen oxide
    ecological indicator
    Źródło:
    Motrol. Motoryzacja i Energetyka Rolnictwa; 2014, 16, 3
    1730-8658
    Pojawia się w:
    Motrol. Motoryzacja i Energetyka Rolnictwa
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Novel method appointing of the effective heat release coefficient during combustion process based on real indicator diagram
    Autorzy:
    Jankowski, A.
    Ambrozik, A.
    Jankowska-Sieminska, B.
    Ślęzak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/244287.pdf
    Data publikacji:
    2007
    Wydawca:
    Instytut Techniczny Wojsk Lotniczych
    Tematy:
    combustion engine
    working cycle
    thermodynamics
    indicator diagram
    heat release
    Opis:
    An object of the paper is a novel method of effective heat release coefficient appointing during combustion process of the based on the real indicator diagram. The process quality of the heat release during process of combustion is evaluated by value of the effective heat release coefficient. Accepted assumptions at appointing effective coefficient of heat release refer to acceptable that thermodynamical parameters of the working charge according to points of the real indicator diagram and the computational diagram are such the same, the maximum pressure of real working cycle of the engine is equal to the pressure of the computational cycle, work of the working charge performed in period from point of closing of the inlet valve to point of the beginning of the exhaust process are for both considered working cycles equal, heat values of the carried to the real and computational cycle are such the same. The method of appointing of the self-ignition delay period is presented in the paper, using to this end intersection point of two graphs of temperature course of the working charge prepared for the first phase of combustion process. Other methods appointing characteristics is suggested in paper basing on the real indicator diagram. The graphic illustration of the preparing method of characteristics of the relative quantity of the heat release during combustion process is illustrated in paper.
    Źródło:
    Journal of KONES; 2007, 14, 4; 133-142
    1231-4005
    2354-0133
    Pojawia się w:
    Journal of KONES
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of the influence of the opening pressure of a marine diesel engine injector on the results of numerical simulation of the working cycle and their comparison with the results of the laboratory experiment
    Autorzy:
    Puzdrowska, Patrycja
    Powiązania:
    https://bibliotekanauki.pl/articles/24202456.pdf
    Data publikacji:
    2023
    Wydawca:
    Polskie Towarzystwo Naukowe Silników Spalinowych
    Tematy:
    marine diesel engine
    numerical simulation
    diagnostic parameters
    injector opening pressure
    okrętowy silnik spalinowy
    symulacje numeryczne
    parametry diagnostyczne
    ciśnienie otwarcia wtryskiwacza
    Opis:
    The article presents the results of a numerical simulation of the working process carried out in a diesel engine. In the applied utility program DIESEL-RK, the laboratory engine Farymann Diesel type D10 was implemented. A selected inoperability of its functional fuel supply system - reduced opening pressure of the injector pinj - was introduced. The values of adequate diagnostic parameters were determined: working gas temperature in the cylinder Tcyl, exhaust gas temperature Texh, combustion (flame) temperature Tcomb and concentration of nitrogen oxides in the exhaust gas NOx. Experimental tests were carried out on the experimental engine with the inoperative condition actually introduced, analogous to the numerical simulation, and the diagnostic parameters Texh and NOx were recorded. The results obtained by numerical simulation of the processes and during the active experiment on the experimental engine were compared.
    Źródło:
    Combustion Engines; 2023, 62, 2; 9--14
    2300-9896
    2658-1442
    Pojawia się w:
    Combustion Engines
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Marine diesels working cycle monitoring on the base of IMES GmbH pressure sensors data
    Autorzy:
    Neumann, Stefan
    Varbanets, Roman
    Kyrylash, Olena
    Maulevych, Vladyslav
    Yeryganov, Oleksiy
    Powiązania:
    https://bibliotekanauki.pl/articles/327592.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
    Tematy:
    diesel engine
    cylinder pressure monitoring
    top dead center
    gas pressure sensor
    Butterworth low-pass filter
    mean indicated pressure
    indicator valve channel
    silnik spalinowy
    czujnik ciśnienia
    monitorowanie
    wydajność
    Opis:
    The paper presents algorithms for marine diesel engines’ working process monitoring designed by analyzing data obtained with IMES pressure sensors. Main features and properties of IMES sensors, used for 2- and 4-stroke modern marine diesel engines, are presented here. The pressure-time diagrams were taken as a basis for creating algorithms for marine diesel engines’ working process monitoring. The task of preliminary calculation of top dead center position (TDC) of a cylinder was solved using polytropic compression equation. TDC position was calculated using the equation P' = 0. Then algorithm for calculating the average indicator pressure and the indicator power of the cylinder has been determined. The CFD methods show how indicator valve channel influences the results of marine diesel engines’ working process monitoring. With the example of compression curves in a cylinder, it’s shown amplitude and phase distortions introduced into pressure measurements by the indicator valve channel. Such research work is important and actual in time due to the use of marine diesel portable performance analysis systems.
    Źródło:
    Diagnostyka; 2019, 20, 2; 21-26
    1641-6414
    2449-5220
    Pojawia się w:
    Diagnostyka
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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