Implementation of a Rotary Engine (Wankel Engine) in a CFD Simulation Tool with Special Emphasis on Combustion and Flow Phenomena

Spreitzer, Johann; Zahradnik, Felix; Geringer, Bernhard

doi:10.4271/2015-01-0382

Cited by 71 publications

(26 citation statements)

References 15 publications

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“…The schematic diagram of the rotary engine adopted in this research is shown in Figure . It is a peripheral ported rotary engine produced by Austro Engine GmbH , the gasoline/hydrogen blend is premixed with air in the intake port, and then enters the combustion chamber. The ignition mode is double spark plug ignition which contains a Trailing‐Side spark plug and a Leading‐Side spark plug.…”

Section: Geometric Model Establishment and Mesh Generationmentioning

confidence: 99%

“…The eddy dissipation concept (EDC) model is chosen as the combustion model because it establishes the coupling between turbulence and detailed chemical reaction mechanism . To simulate the combustion process of the gasoline–hydrogen mixture in the chamber, a reduced iso‐octane oxidation mechanism consisting of 38 components and 69 individual reaction equations is chosen. The reaction mechanism is given in the form of elementary equations to describe a general chemical reaction in detail and it has been validated in shock tube, rapid compression machine, jet stirred reactor, and ICE over a wide range of conditions by Jia .…”

Section: Calculation Models and Model Validationmentioning

confidence: 99%

“…The EDC model which can establish the coupling between turbulence and detailed chemical reaction is selected as the combustion model in this research. To verify its rationality, a gasoline rotary engine simulation model is set in accordance with the working conditions in literature , the engine operated under the condition of 6000 rpm, and the throttle fully opened, more detailed parameters are shown in Table . Figure a shows the comparison between the simulation results and the experimental pressure values in literature .…”

Section: Calculation Models and Model Validationmentioning

confidence: 99%

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Effect of different hydrogen blending ratios on combustion process of gasoline‐fueled rotary engine

Pan

Huang

et al. 2019

Env Prog and Sustain Energy

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The pre‐eminent gasoline rotary engine may be criticized for its unsatisfactory fuel consumption rate and unburnt emissions. The clean and renewable hydrogen fuel is a promising alternative for conventional fuels to improve the combustion process and power performance of the rotary engine. In this article, highly advanced numerical simulation was used to obtain some pivotal results such as the distribution of combustion intermediates, the turbulent kinetic energy, the kinetic rate of reactions, and the fuel concentration fields which are difficult to experimentally achieve. An experimentally validated three‐dimensional dynamic simulation model of a rotary engine coupled with chemical kinetics skeletal mechanism was set up to exactly investigate the effects of hydrogen blending on the combustion process, power performance, and pollutant emissions. The results showed that with the increase of hydrogen mixing ratio, the average pressure and the peak pressure increased in the combustion process. Meanwhile, more combustion active intermediates were generated in both the flame development period and flame propagation period. The mass fraction of OH and H radicals has an increase of 36% and 34%, respectively. The fuel combustion rate rose and the turbulent kinetic energy increased which are conducive to improving flame diffusion in the rear part of the chamber and thus facilitate the complete combustion of the fuel. Moreover, the hydrogen blending led to an effective reduction in the CO emission of gasoline‐fueled rotary engine; however, the NO emission slightly increased due to the rise of temperature in cylinder. © 2019 American Institute of Chemical Engineers Environ Prog, 38:e13146, 2019

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Section: Geometric Model Establishment and Mesh Generationmentioning

confidence: 99%

Section: Calculation Models and Model Validationmentioning

confidence: 99%

Section: Calculation Models and Model Validationmentioning

confidence: 99%

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Effect of different hydrogen blending ratios on combustion process of gasoline‐fueled rotary engine

Pan

Huang

et al. 2019

Env Prog and Sustain Energy

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“…Different studies have been carried out since the invention of the rotary engine by Felix Wankel to improve its design and performance [1][2][3]. Various work reported on the simulation and optimization of the Wankel engine combustion chambers with several fuels such as petrol [4][5], methane and octane [6], hydrogen and diesel [7] and hydrogen enriched ethanol and gasoline [8][9]. Researchers also investigated the effects of apex seals on the performance of the Wankel engine [10][11], whereas others studied the side ports, a micro rotary internal combustion engine [12,13] and design of the Wankel engine [14].…”

Section: Introductionmentioning

confidence: 99%

CFD simulations of compressed air two stage rotary Wankel expander – Parametric analysis

Sadiq

Tozer

Al-Dadah

et al. 2017

Energy Conversion and Management

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“…The above numerical simulation research method has great advantage in the research of flow field in rotary engine. 29 This is chiefly because the detailed information of flow field which is difficult to measure in experiment can be obtained by numerical simulation research. However, due to the neglect of the influence of apex seal leakage on the flow field in the above numerical simulation studies, only the change laws of 3D flow field in cylinder without considering apex seal leakage have been revealed.…”

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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Implementation of a Rotary Engine (Wankel Engine) in a CFD Simulation Tool with Special Emphasis on Combustion and Flow Phenomena

Cited by 71 publications

References 15 publications

Effect of different hydrogen blending ratios on combustion process of gasoline‐fueled rotary engine

Effect of different hydrogen blending ratios on combustion process of gasoline‐fueled rotary engine

CFD simulations of compressed air two stage rotary Wankel expander – Parametric analysis

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

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