Theoretical analysis of air-fuel mixture formation in the combustion chambers of the gas engine with two-stage combustion system

Jamrozik, Arkadiusz; Tutak, Wojciech

doi:10.2478/bpasts-2014-0085

Cited by 6 publications

(5 citation statements)

References 10 publications

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“…1B, tions transesterification [4,5]. In the literature it can be found studied on alternative combustion systems such as stratified combustion system which provides the possibility of burning ultra-poor mixture [6][7][8][9]. In recent years great attention is paid to the use of alternative fuels [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Effect of diesel-biodiesel-ethanol blend on combustion, performance, and emissions characteristics on a direct injection diesel engine

et al. 2017

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The paper presents results of co-combustion of diesel-biodiesel-ethanol fuel blend in direct injection Diesel engine. Test was performed at constant rotational speed at three commonly used loads of this engine: 100%, 85%, and 70% of load. During the test hydrated ethanol was used at a concentration of 89% of alcohol. In this study, the ethanol fuel was added to diesel-biodiesel fuel blend with concentrations up to 50% with the increment of 5%. The biodiesel was used as an additive to prevent the stratification of ethanol and diesel blends. Thermodynamic parameters of engine were analyzed, and combustion process and exhaust emission were characterized. It turned out that with the increase in engine load is possible to utilize larger ethanol fraction in blend. With the increase of ethanol fuel in blend the increase in ignition delay (38.5% for full load) was observed, but burning duration decreased (49% for full load). The ethanol fuel share in blend generally causes the increase in NO x emission (42% for full load) due to higher oxygen content and higher in-cylinder temperatures. It turned out that, at full load the unrepeatability of indicated mean effective pressure was near the same up to 50% of ethanol fuel in blend (about 2%). In case of partial load at higher ethanol fuel fraction the increase in indicated mean effective pressure un-repeatability was observed.

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Section: Introductionmentioning

confidence: 99%

Effect of diesel-biodiesel-ethanol blend on combustion, performance, and emissions characteristics on a direct injection diesel engine

et al. 2017

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“…The search concern for new fuels to power internal combustion engines include not only vehicle traction engines but also stationary engines to power generators, which are built as cogeneration systems to produce electricity and heat . New fuels should reduce the emission of harmful exhaust gases with the constant engine performance and a high efficiency.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigations on combustion, performance, and emission characteristics of stationary CI engine fueled with diesel–methanol and biodiesel–methanol blends

Jamrozik

Tutak

Pyrc

et al. 2017

Env Prog and Sustain Energy

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This article presents the experimental studies of the one‐cylinder, stationary diesel engine powered by blends of diesel and biodiesel with methanol. In the case of diesel–methanol mixture (DM) investigated, there is up to 40% of the alcohol content in the mixture, while in the case of biodiesel–methanol mixture (BM), the share of the alcohol was up to 50%. The normal combustion process achieved up to 30% of alcohol fraction. Further increase in the alcohol content led to a significant drop in cylinder pressure and the abnormal combustion process. The analysis of the test results showed that in both cases the alcohol content in the mixture should not exceed 30%. In case of DM blend, the increase in ITE by 13% and for BM by 11% compared to powering by diesel or biodiesel fuel. IMEP is kept on near the same level equal to 6.6 bar for DM and 5.8 bar for BM. For these mixtures, it was not exceeded the limited value of COVIMEP equal to 10. The increase in the methanol content up to 30% does not significantly affect changes in emissions of hydrocarbons (THC) and carbon dioxide (CO2), and reduces emission of carbon monoxide (CO). The increase in methanol fraction in blend up to 30% causes large decrease in CO emission (of about 60%) and it does not cause significant changes in hydrocarbon emissions THC and CO2. This methanol fraction causes the increase in NOx emission. The emission of NOx was increased by 68% for DM and by 35% for BM. © 2017 American Institute of Chemical Engineers Environ Prog, 36: 1151–1163, 2017

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“…When burning methane, it is possible to obtain an air excess ratio of 2.5 [4,5], ensuring that the engine work irregularity remains below 5%. The theoretical analysis of the formation of the air-fuel mixture in a gas engine with a two-stage combustion system was carried out by Tutak and Jamrozik [6]. Analyses regarding passive prechambers confirmed that similar values of excess air ratio were obtained in both prechambers [7].…”

Section: Introductionmentioning

confidence: 92%

Bulletin of the Polish Academy of Sciences: Technical Sciences

Pielecha

2021

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The development of combustion systems construction is associated with the possibility of increasing the thermal or overall efficiency of an internal combustion engine. The combustion systems currently in use (mainly related to direct fuel injection) are increasingly being replaced by hybrid systems, including direct and indirect injection. Another alternative is the use of prechambers in new combustion systems. This article concerns the thermodynamic aspect of this issue -namely, the assessment of the inter-chamber f low of a marine engine equipped with a prechamber combustion spark ignition system. The research was carried out using mainly one-dimensional simulation apparatus, and detailed analyses were presented using three-dimensional modeling. The tests included the engine model at medium load. Differences in mass f lows were shown at different diameters and different numbers of holes from the preliminary chamber (while maintaining the same cross-sectional area). Similar values of excess air coefficient during ignition of the fuel dose in the prechamber were observed, which resulted in changes in the f low between the prechamber and the main chamber. The differences in mass f low affected the temperatures achieved in the individual combustion chambers. Based on three-dimensional analyses, the mass transfer rate between the chambers and the temperature distribution were assessed during fuel ignition initiated in the prechamber.

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Theoretical analysis of air-fuel mixture formation in the combustion chambers of the gas engine with two-stage combustion system

Cited by 6 publications

References 10 publications

Effect of diesel-biodiesel-ethanol blend on combustion, performance, and emissions characteristics on a direct injection diesel engine

Effect of diesel-biodiesel-ethanol blend on combustion, performance, and emissions characteristics on a direct injection diesel engine

Experimental investigations on combustion, performance, and emission characteristics of stationary CI engine fueled with diesel–methanol and biodiesel–methanol blends

Bulletin of the Polish Academy of Sciences: Technical Sciences

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