Numerical study of hydrogen direct injection strategy on mixture formation and combustion process in a partially premixed gasoline Wankel rotary engine

Yang, Jinxin; Ji, Changwei; Wang, Shuofeng; Wei, Du; Cheng, Shen; Ma, Zedong; Zhang, Boya

doi:10.1016/j.enconman.2018.09.008

Cited by 57 publications

(18 citation statements)

References 66 publications

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“…However, the emissions from Wankel engines are great issues due to incomplete combustion in cylinders. The combustion chambers of Wankel engines are long and narrow, which leads to a serious quenching effect, resulting of much unburnt fuel being emitted into the atmosphere (Yang et al, 2018). The commonly used approaches to decrease the quenching effect are focused on increasing the flame propagation speed and decreasing the quenching distance (Shi et al, 2019b), which can be achieved by hydrogen addition (Fedyanov et al, 2019;Ozcanli et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Intake characteristics and pumping loss in the intake stroke of a novel small scale opposed rotary piston engine

Gao

Tian

Jenner

et al. 2020

Journal of Cleaner Production

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Section: Introductionmentioning

confidence: 99%

Intake characteristics and pumping loss in the intake stroke of a novel small scale opposed rotary piston engine

Gao

Tian

Jenner

et al. 2020

Journal of Cleaner Production

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“…The mesh independence test of the grid in the three CCs has been done in our previous work 25 . In addition, except for our previous work, 25 the rotary engine used in the present study also was used as the research object in the previous works of Yang, et al 3,28 Their results also showed that the 2.0 mm grid used in the three CCs could meet the simulation accuracy requirements. For the grid near the cylinder wall, the refined structured hexahedral grid is used.…”

Section: Mathematical Models and Model Validationmentioning

confidence: 58%

“…35 Precisely because of the above reason, RNG k − ε turbulence model has been widely considered to be able to meet the needs of flow field calculation of rotary engine. 7,10,25,28 Engine technical specifications.…”

Section: Boundary Conditions Turbulence Model Selection and Modelmentioning

confidence: 99%

“…This is mainly because the RNG k − ε turbulence model can consider the streamline bending, swirl, rotation, and fast changing tension effects 35 . Precisely because of the above reason, RNG k − ε turbulence model has been widely considered to be able to meet the needs of flow field calculation of rotary engine 7,10,25,28 . In addition, in order to further verify the rationality of choosing RNG k − ε turbulence model, based on an optical side ported rotary engine test‐bed established in our previous work, 25 the flow field on the RHCP was tested by PIV.…”

Section: Mathematical Models and Model Validationmentioning

confidence: 99%

“…This is principally because the 3D‐PIV experiment is very difficult, and no literature is available on the 3D‐PIV experiment research of rotary engines. In terms of the numerical simulation aspect, the research of flow field in rotary engine has developed from 1D, 26 2D 27 to 3D 25,28 with the development of numerical simulation. The above numerical simulation research method has great advantage in the research of flow field in rotary engine 29 .…”

Section: Introductionmentioning

confidence: 99%

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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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Study on combustion and emission characteristics of a micro‐rotary cam internal combustion engine

Zhu,

Yang,

Hao

et al. 2023

Engineering Reports

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In this article, the construction principle of rotary engine and sliding vane internal combustion engine is carefully analyzed, and the concept of micro‐rotary cam internal combustion engine is proposed by integrating and innovating on them. Overall design, theoretical analysis, and model making of miniature rotary cam internal combustion engine and its supporting system. The effects of different air intake modes and different ignition advance angles on the combustion and emission characteristics of internal combustion engines were studied. Through the study of the flow field, combustion and emission characteristics of small rotating internal combustion engines, it is found that the intake form has a great influence on the cylinder smoothness of rotating internal combustion engines. The vortex formed by the end cover inlet air in the middle of the combustion chamber can fully mix the fuel and air in the cylinder, and the mixture is evenly distributed in the combustion chamber to effectively promote the spread of flame. Compared with the surrounding air intake structure, the heat release should be increased by 4.3%, and the total amount of HC and CO generated was 26.8% and 15.7% less, respectively. By studying the turbulent kinetic energy, combustion heat release, peak temperature and pressure in the cylinder, fuel consumption rate and emission characteristics of small rotary internal combustion engine, it is found that when the ignition advance angle of the small rotating internal combustion engine is 5°, the peak pressure in the cylinder is increased by 2.3% compared with other schemes, the fuel consumption rate is high, and the combustion is more complete. In addition, in terms of emission characteristics, the amount of CO and HC generated when the ignition advance angle is 5° are reduced by 35% and 35.3%, respectively.

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Numerical study of hydrogen direct injection strategy on mixture formation and combustion process in a partially premixed gasoline Wankel rotary engine

Cited by 57 publications

References 66 publications

Intake characteristics and pumping loss in the intake stroke of a novel small scale opposed rotary piston engine

Intake characteristics and pumping loss in the intake stroke of a novel small scale opposed rotary piston engine

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

Study on combustion and emission characteristics of a micro‐rotary cam internal combustion engine

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