Numerical investigation of the effect of advance ignition timing on combustion process in direct injection rotary engine fueled with biodiesel

Otchere, Peter; Pan, Jianfeng; Fan, Bo; Chen, Wei; Lu, Yao; Li, Jianxing

doi:10.1002/ep.13368

Cited by 9 publications

(3 citation statements)

References 29 publications

(45 reference statements)

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“…Ignition timing is very important in the combustion process. Optimum ignition time increases incylinder pressure and reduces soot emissions (Otchere et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Bir Wankel Motorunda Farklı Ateşleme Avanslarının Performans ve Emisyonlar Üzerinde Etkisi

Cihan

Kutlar

Demirci

et al. 2020

Konya Journal of Engineering Sciences

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In this study, the optimum advances for parameters such as specific fuel consumption, emissions were investigated in ignition advances below 10 0 EA and above 10 0 EA. Cylinder pressure was measured for calculating the heat release rate. 13B MSP (Multi Side Port) single rotor and port fuel injection Wankel engine was used in the experiments. In this context, single rotor Wankel test engine was operated at 2000, 3000 and 4000 rpm engine speed, part loads and λ = 1 condition. The optimum ignition advance is based on the value at which the maximum torque is obtained. Thus, the effect of ignition advance was investigated on Wankel engine. As a result, it is observed that ignition advance has a significant effect on emissions, in-cylinder pressure and fuel consumption in Wankel engine.

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“…Ignition timing is very important in the combustion process. Optimum ignition time increases incylinder pressure and reduces soot emissions (Otchere et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Bir Wankel Motorunda Farklı Ateşleme Avanslarının Performans ve Emisyonlar Üzerinde Etkisi

Cihan

Kutlar

Demirci

et al. 2020

Konya Journal of Engineering Sciences

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show abstract

“…Therefore, more and more attention has been paid to the research and development of the rotary engine. 7 At present, liquid and gas fuels that have been successfully used in the rotary engine include gasoline, 8 diesel, 9 aviation kerosene, 10 natural gas, 11 and hydrogen. 12 Compared with liquid fuel, gas fuels are considered to be more promising fuels for the rotary engine.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation on the Combustion Performance of a Natural Gas/Hydrogen Dual Fuel Rotary Engine under the Action of Apex Seal Leakage

et al. 2020

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Direct injection (DI) technology can improve the combustion performance of the rotary engine by realizing the fuel stratification in the cylinder. The purpose of this paper is to numerically investigate the influence of hydrogen DI strategy on the combustion process in a DI natural gas/hydrogen rotary engine. In addition, it should be noted that the apex seal leakage (ASL) problem is difficult to avoid in the actual work process of the rotary engine. Meanwhile, the ASL flow can significantly change the fuel movement and flame propagation in the rotary engine. Therefore, the action of ASL cannot be ignored for the in-depth study of the combustion process. In this paper a 3D dynamic simulation model considering ASL was first established and verified by particle image velocimetry (PIV) results and in-cylinder-pressure experiment results. Further, based on the established 3D model, the fuel movement and flame propagation process of the DI natural gas/hydrogen rotary engine under varied hydrogen injection position and hydrogen injection timing were numerically studied. By comparing the fuel distribution and combustion speed of all calculation cases, an ideal hydrogen distribution which could improve the engine combustion efficiency was obtained. The ideal hydrogen distribution is that, under the premise of ensuring minimized hydrogen leakage, the hydrogen should mainly distribute in the middle and front of the cylinder, and a high hydrogen concentration should distribute around the spark plug. Under the guidance of the research results of this paper, to promote the engine combustion performance in the actual engine development, the position which is located at the intersection between the cylinder form line and the major axis is recommended as the installation position of the hydrogen nozzle, and 240°CA (BTDC) is recommended as the injection timing of the hydrogen nozzle.

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“…10 Among them, the study of flow field is the basis of studying mixture formation and flame propagation. 11 This is because the mixture formation, 12 flame propagation, 13 and emission formation 14 are affected by the flow field. Therefore, the in-depth investigation of the flow field is very important.…”

mentioning

confidence: 99%

The formation mechanisms of flow field in a compound intake ported rotary engine considering apex seal leakage

Fan

Zhang

Pan

et al. 2020

Env Prog and Sustain Energy

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The development of rotary engines is severely restricted by its low combustion efficiency and high emission. In-cylinder flow field is known to play a major role in combustion process for rotary engines. Therefore, in the present article, a threedimensional dynamic simulation model considering leakage through apex seals was developed and verified by the two-dimensional particle image velocimetry experiment results on the rotor housing central plane. Based on the three-dimensional dynamic simulation model, the formation mechanisms of flow field in a compound intake ported rotary engine under different apex seal leakage gap sizes (0.02, 0.04, 0.06, and 0.08 mms) and engine speeds (2,000, 3,500, and 5,000 rpms) were numerically studied. The simulation results showed that there exist two formation mechanisms of the flow field in the intake stroke, that is, "side intake port dominance" and "peripheral intake port dominance." For the three engine speeds (2,000, 3,500, and 5,000 rpms), with the increase of apex seal leakage gap size, the formation mechanism of the flow field gradually changed from "side intake port dominance" to "peripheral intake port dominance." In addition, the influences of apex seal leakage on the volume coefficient and the turbulence kinetic energy in the combustion chamber were also investigated in detail. K E Y W O R D S apex seal leakage, compound intake port, flow field, rotary engine 1 | INTRODUCTION With the increasingly serious energy crisis and environmental problems, it is urgent to develop new types of engines that have higher efficiency and lower pollution. 1,2 As a new type of engine, with simple structure and high power-to-weight ratio, rotary engines have been widely used in many fields, such as aircraft, cars and motorcycles for many years. 3 In particular, the rapid development of small unmanned aerial vehicles (SUAVs) and range extended electric vehicles (REEVs) in recent years has provided new opportunities for rotary engines. This is mainly because SUAVs and REEVs need a small size and high power-to-weight power device, and rotary engines can well meet the above requirements. 4 For example, a range extender with a rotary engine designed by AVL List GmbH is regarded as one of the most promising power generation mode for REEVs. 5 Because of the above promising application prospects, the investigation, and development of rotary engines have attracted more and more attention from many countries and research institutions. 6

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Numerical investigation of the effect of advance ignition timing on combustion process in direct injection rotary engine fueled with biodiesel

Cited by 9 publications

References 29 publications

Bir Wankel Motorunda Farklı Ateşleme Avanslarının Performans ve Emisyonlar Üzerinde Etkisi

Bir Wankel Motorunda Farklı Ateşleme Avanslarının Performans ve Emisyonlar Üzerinde Etkisi

Numerical Investigation on the Combustion Performance of a Natural Gas/Hydrogen Dual Fuel Rotary Engine under the Action of Apex Seal Leakage

The formation mechanisms of flow field in a compound intake ported rotary engine considering apex seal leakage

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