Numerical simulation of the flowfield in a motored two-dimensional Wankel engine

Shih, Tsan‐Hsing; Schock, Harold; Nguyen, H. L.; Stegeman, James

doi:10.2514/3.22984

Cited by 11 publications

(2 citation statements)

References 10 publications

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“…Nevertheless, these valuable experimental data could still be used for validating the simulation. In terms of numerical simulations, some studies (Abraham & Bracco, 1988;T. I. Shih, Schock, Nguyen, & Stegeman, 1987) have used two-dimensional and three-dimensional numerical simulations to model the flow and combustion processes in rotary engines.…”

Section: Introductionmentioning

confidence: 99%

Effects of different parameters on the flow field of peripheral ported rotary engines

Fan

Pan

Yang

et al. 2015

Engineering Applications of Computational Fluid Mechanics

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The performance of rotary engines is significantly influenced by the flow field. In this study, a detailed mathematical model was integrated into the simulation software FLUENT to investigate the gas flow field in a peripheral ported rotary engine by including a dynamic mesh model and a turbulent flow model. The models were also validated by experimental data. The basic flow mechanism in the combustion chamber was numerically studied. Meanwhile, the effects of the three major parameters on the flow field inside the combustion chamber, namely, rotating speed, intake shape, and intake angle, were also investigated. Results showed that a constantly changing swirl was formed in the combustion chamber during the intake and compression strokes as a result of the combined effects of the pocket of the rotor and the swirls in the combustion chamber. The swirl eventually broke into a unidirectional flow near the top dead center because of the significant decrease in combustion chamber volume. Furthermore, with the change in rotating speed, intake shape, and intake angle, significant differences in flow speed, inertia, and distribution were observed when the fluid entered the combustion chamber, which, in turn, led to obvious differences in the flow field, volume coefficient, and average turbulence kinetic energy in the combustion chamber.

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Section: Introductionmentioning

confidence: 99%

Effects of different parameters on the flow field of peripheral ported rotary engines

Fan

Pan

Yang

et al. 2015

Engineering Applications of Computational Fluid Mechanics

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“…A small rotary engine due to a large surface-to-volume ratio aggravates this problem. Previous investigations have suggested that thermal efficiency is closely related to the mechanism of the flow field [4][5][6][7]. Due to the long and narrow space of the chamber and high-speed rotation of the rotor, turbulence is the most prominent feature in the flow field.…”

Section: Introductionmentioning

confidence: 99%

The Study of Turbulent Fluctuation Characteristics in a Small Rotary Engine with a Peripheral Port Based on the Improved Delayed Detached Eddy Simulation Shear-Stress Transport (IDDES-SST) Method

2018

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Abstract:In this paper, an improved delayed detached eddy simulation method combined with shear-stress transport (SST) model was used to study the three-dimensional turbulent characteristics in a small rotary engine with a peripheral port. The turbulent characteristics including instantaneous velocity, turbulent fluctuation, coherent structure and velocity circulation were analysed based on a dynamic model of the small rotary engine. Three sets of conclusions on the basis of computational results were obtained. First, it was found that large-scale vortex structures with high intensity were distributed in the center of the chamber in the intake process and broke into lots of small vortex structures in the compression process. Second, flow stability in the X direction decreased from the leading to the trailing in the small rotary engine. The fluctuation velocity of the Y direction showed the paraboloid feature and its peak position moved from the mid-back to the middle of the chamber during the operation process. Third, during the intake process, two vortices occurred in the cross section parallel to the covers and were located at the leading and trailing of the cross section, respectively. Compared to the intake process, more vortices occur at cross sections which were far away from the central section during the compression process.

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Study on vortex characteristics and velocity distribution in small rotary engine

Qin

Jia

Yang

2020

Energy

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Numerical simulation of the flowfield in a motored two-dimensional Wankel engine

Cited by 11 publications

References 10 publications

Effects of different parameters on the flow field of peripheral ported rotary engines

Effects of different parameters on the flow field of peripheral ported rotary engines

The Study of Turbulent Fluctuation Characteristics in a Small Rotary Engine with a Peripheral Port Based on the Improved Delayed Detached Eddy Simulation Shear-Stress Transport (IDDES-SST) Method

Study on vortex characteristics and velocity distribution in small rotary engine

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