Autor: Tutak, W. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Possibility to reduce knock combustion by EGR in the SI test engine
Autorzy:: Tutak, W.
Powiązania:: https://bibliotekanauki.pl/articles/246177.pdf
Data publikacji:: 2011
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion
knock
exhaust gas recirculation (EGR)
modelling
thermal cycle
Opis:: The paper presents the results of modelling thermal cycle of internal combustion engine including exhaust gas recirculation. The test engine can not achieve the optimum parameters of work due to occurrence of the knock combustion. The influence of EGR on the limits of the knock occurrence in the engine was studied. It turned out that few percent of exhaust gases in the fresh charge effectively shifts the knock limit to higher ignition advance angles. The values of the limit ignition timing for the test engine was determined in order to avoid combustion knock. Larger share of EGR caused too much slowing the spread of the flame inside the combustion chamber of the test engine. EGR at constant angle of ignition was very effective in limiting the content of NO in the exhaust, but on the other hand it has an adverse effect on the engine parameters. The engine operate with exhaust gas recirculation in order to obtain the possible best parameters the ignition timing should be optimized. However, that with increasing values of the thermodynamic parameters of thermal cycle of engine increased NO content in the exhaust. The paper presents results of modelling thermal cycle of IC engine, including exhaust gas recirculation and knock combustion. The object of researches was the S320ER spark ignition internal combustion engine supplied with petrol. The engine was operated at a constant speed of1000 rpm. Modelling of the thermal cycle of the test SI engine in the FIRE software was carried out.
Źródło:: Journal of KONES; 2011, 18, 3; 485-492
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Cmbustion of mixture of diesel fuel with gasoline in a compression ignition engine
Autorzy:: Tutak, W.
Jamrozik, A.
Powiązania:: https://bibliotekanauki.pl/articles/242181.pdf
Data publikacji:: 2018
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion
engine
diesel
gasoline
combustion phases
Opis:: Paper presents results of experimental investigation of combustion process of diesel-gasoline blend in compression ignition direct injection engine. The researches were conducted for constant load of engine at constant rotational speed. Operating parameters of engine powered with diesel-gasoline blend were at the same level as for engine powered by pure diesel fuel. The preliminary study was conducted using CFD modelling. Based on encouraging modelling results preliminary experimental research was carried out. It turned out that it is possible to co-burning diesel with the gasoline as a blend. A mixture of 20, 40 and 60% of gasoline with diesel was used. It was concluded that an increase in gasoline fraction in blend causes delay of start of the combustion process. The homogeneity of the fuel-air mixture was improved due to longer ignition delay, which is accompanied by higher values of pressure rise rate. With 20 and 40% of gasoline fraction causes higher peak pressure compared to reference fuel-burning ware obtained. Up to 40% of gasoline fraction, the BSFC was kept at the same level as for reference fuel. It was observed that with the increase in gasoline fraction up to 40% NOx emission increased as well. Based on the carried out tests it can be stated that it is possible to co-burn gasoline with diesel in a compression ignition engine while maintaining the invariable engine operating parameters and exhaust emissions.
Źródło:: Journal of KONES; 2018, 25, 2; 391-398
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 3.

Tytuł:: The effect of methanol-diesel combustion on performance and emissions of a direct injection diesel engine
Autorzy:: Tutak, W.
Szwaja, S.
Powiązania:: https://bibliotekanauki.pl/articles/241919.pdf
Data publikacji:: 2015
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: dual-fuel engine
exhaust emission
modelling
diesel
Opis:: The results of CFD modelling a dual fuel diesel engine powered with both methanol and diesel fuel is presented in the paper. Modelling was performed with 20 and a 50% energetic share of methanol in the entire dose. The analysis was conducted on both the thermodynamic parameters and exhaust toxicity of dual fuel engine. It was found that the various share of methanol influences the ignition delay of the combustion process and after start of main phase of combustion, the process occurs faster than in case of the diesel engine. It was found that the time of 10-90% burn of the fuel is much shorter than it is in the diesel engine. The dual fuel engine was characterized by higher indicated mean pressure in the whole range of diesel fuel injection timings. While analysing toxic exhaust emission from the dual fuel engine powered with methanol, it was found that the rate of NO formation was significantly higher than from the diesel engine. The combustion process in the dual fuel engine occurs more rapidly than in the conventional diesel engine, which contributes to form areas with high temperature, and in combination with presence of oxygen from the air and oxygen bonded in the methanol, promotes the NO formation. In the case of the dual fuel engine, it was found that soot emission was reduced. The engine running with diesel injection start at 8.5 deg before TDC, the soot emissions were more than twice lower in the dual fuel engine, while the emission of NO was much higher.
Źródło:: Journal of KONES; 2015, 22, 2; 259-266
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 4.

Tytuł:: Indication errors of engine with two stage combustion system
Błędy indykowania silnika ZI z dwustopniowym systemem spalania
Autorzy:: Jamrozik, A.
Kociszewski, A.
Tutak, W.
Powiązania:: https://bibliotekanauki.pl/articles/245724.pdf
Data publikacji:: 2009
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: indykowanie silnika
ciśnienie indykowane
sprawność indykowana
współczynnik niepowtarzalności pracy indykowanej
indication engines
indicated pressure
indicated efficiency
non-repeatability factor of indicated work
Opis:: Paper presents indication results accuracy and accuracy of thermal processes analysis which occurs in the cylinder of internal combustion engine in particular. The characteristic values of thermal cycle of IC engine are: indicated efficiency and pressure and non-repeatability factor of indicated work. Paper presents results of measuring errors analysis and uncertainty of above mentioned quantities obtained from indication of spark ignition internal combustion engine with prechamber. The analysis shows that results of indication of piston engine should included Information of measurement accuracy values and uncertainty of calculated quantities. This information has significant influence on final measurement results. No measurement, regardless of accuracy ofits realization does not give absolutely exact result. The error ofwell-known limits is a part and parcel of the measurement result and the result of the measurement whose errors are not well-known results nothing referring. Indication o f a combustion engine is at present standard- investigative practical method in the sphere of piston-combustion engines, allowing on the transient values registration of parameters processes occurring in the cylinder of the engine and making possible analysis of the influence of different factors on their courses.
Wyniki indykowania silnika tłokowego, a w szczególności wyniki analizy procesów termicznych zachodzących w cylindrze silnika są w różnym stopniu uzależnione od dokładności pomiarów oraz niepewność uzyskanego wyniku. Wielkościami charakteryzującymi pracę silnika spalinowego pod względem jego osiągów są wskaźniki pracy silnika takie jak: sprawność i ciśnienie indykowane oraz współczynnik niepowtarzalności pracy indykowanej. W pracy przedstawiono analizę błędów pomiarowych i niepewności uzyskanych wyników wyżej wymienionych wielkości podczas indykowania silnika spalinowego o zapłonie iskrowym z komorą wstępną. W wyniku przeprowadzonych obliczeń można stwierdzić, że aby można było wiarygodnie interpretować wyniki analizy indykowania tłokowego silnika spalinowego powinny one zawierać wartości błędów i niepewności pomiarowych, gdyż ich wielkość ma znaczący wpływ na końcowy wynik pomiaru. Żaden pomiar, niezależnie od staranności jego wykonania nie daje całkowicie dokładnego wyniku. Błąd o znanych granicach jest nieodłączną częścią wyniku pomiaru, a wynik pomiaru, którego biedy nie są znane jest wynikiem nic niemówiącym.
Źródło:: Journal of KONES; 2009, 16, 4; 179-193
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 5.

Tytuł:: CFD modeling of thermal cycle of supercharged compression ignition engine
Autorzy:: Tutak, W.
Jamrozik, A.
Gruca, M.
Powiązania:: https://bibliotekanauki.pl/articles/247943.pdf
Data publikacji:: 2012
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: combustion
modelling
CFD
diesel
injection
Opis:: Results of modelling of thermal cycle of turbocharged compression ignition IC engine are presented. The object of investigation was a 6CT107 turbocharged auto-ignition internal combustion engine powered by diesel oil, installed on an ANDORIA-MOT 100 kVA/ 80 kW power generating set in a portable version. The performed simulations of the combustion process have provided information on the spatial and time distributions of selected quantities within the combustion chamber of the test engine. The numerical analysis results have been juxtaposed with the results of indicating the engine on the test stand. Modelling of the thermal cycle of an auto-ignition piston engine in the AVL FIRE was carried out within the study. Advanced numerical submodels were used to analysis of combustion process, such as: Extended Coherent Flame Model (ECFM-3Z), turbulence model k-zeta-f, injection submodels with evaporation, collisions, coalescence and other. Intake and exhaust processes were included during modelling. This resulted in a lot of information about the intake, fuel mixing, ignition process and the exhaust process. Results of modelling were compared with results from real engine.
Źródło:: Journal of KONES; 2012, 19, 1; 465-472
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 6.

Tytuł:: Modelling of the over-expanded cycle combustion engine
Autorzy:: Jamrozik, A.
Tutak, W.
Grab-Rogaliński, K.
Powiązania:: https://bibliotekanauki.pl/articles/245973.pdf
Data publikacji:: 2018
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: over-expanded cycle
methane
gas engine
modelling
Opis:: The study concerns numerical tests of an internal combustion engine operating according to the over-expanded cycle carried out in the AVL Fire software. The research covered the modelling of a full working cycle of a conventional engine operating in accordance with the classic Otto cycle and an engine operating on the basis of an over-expanded cycle – the Atkinson cycle. As part of the work, three cases of Atkinson’s cycle were analysed, by closing the inlet valve before BDC (21º before BDC) and closing the valve after BDC (41º and 75º after BDC). As a result of modelling, space-time distributions of velocity, pressure and temperature in the cylinder of the modelled engine were obtained. Optimizations of the analysed cycles were carried out, finding the best ignition timing, at which it is possible to obtain the highest efficiency and the highest indicated mean effective pressure. The calculations showed that the engine operating according to the over-expanded cycle in order to obtain the best operating parameters requires earlier ignition timing compared to the conventional engine. In addition, in the engine operating according to the Atkinson cycle, there is a drop in the indicated mean effective pressure and an increase in the indicated thermal efficiency compared to the engine operating by the classical cycle.
Źródło:: Journal of KONES; 2018, 25, 3; 237-245
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 7.

Tytuł:: The Miller cycle based IC engine fuelled with a CNG/hydrogen
Autorzy:: Grab-Rogaliński, K.
Szwaja, S.
Tutak, W.
Powiązania:: https://bibliotekanauki.pl/articles/246306.pdf
Data publikacji:: 2014
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: hydrogen
miller cycle
gaseous fuels
combustion engines
Opis:: The results of research conducted on a supercharged spark ignition gaseous engine are exposed in the paper. The engine was modified to work as an engine with the Miller cycle. Modification of the engine, that allowed it to work in the Miller cycle, dealt particularly with the camshaft. This modification allows changing both intake and exhaust timings independently with limitations of ±20 deg. During the research, the engine was fuelled with compressed natural gas or hydrogen optionally. It was for making comparison between selected engine parameters, while the engine was working on two significantly different fuels. Both fuels were delivered to intake manifold close to intake valve through a fuel mixer. During the research, pressure data was collected with various both spark ignition timings and equivalence ratios, and boost pressures. On the basis of obtained data the parameters as follows: indicated mean effective pressure, coefficient of variance from the indicated mean effective pressure, Normalized Mass Fraction Burn and Heat Release Rate were calculated and discussed. As observed optimal ignition, timing is advanced for the engine working on hydrogen or natural gas as fuel with the Miller cycle when compared to the classic Otto cycle applied to this engine. In all tests of the engine with the Miller cycle coefficient of variance from the indicated mean effective pressure indicates good stability of engine work. Finally, the engine working on hydrogen is characterized by shorter combustion period that resulted from higher laminar flame speed compared to the natural gas fuelled engine.
Źródło:: Journal of KONES; 2014, 21, 4; 137-144
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "Tutak, W." wg kryterium: Autor

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język