The Numerical Investigation on the Performance of Rotary Engine with Leakage, Different Fuels and Recess sizes

Jeng, Dun-Zen; Hsieh, Ming-June; Lee, Chih-Chuan; Han, Yu

doi:10.4271/2013-32-9160

Cited by 27 publications

(13 citation statements)

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“…Better combustion can be obtained with a pocket located at the middle and shallower pocket. Similarly, different recess (pocket) sizes were numerically investigated by Jeng et al 76 . As it was shown earlier that different recess geometries, the minimum volume is significantly affected, and the compression ratio CR as well (Fig.…”

Section: Intake Vorticesmentioning

confidence: 99%

“…In the model constructed by Zenh et al 76 using the CFD software FLUENT, the high temperature zone did not travel in the combustion chamber after ignition. This is because the simulation did not well-estimate the reaction rate and the gas does not react immediately in the chamber.…”

Section: Computational Fluid Dynamics Cfd Approachesmentioning

confidence: 99%

“…The unburned HC is to decrease Baseline Engine performance improves, but HC level increases (67) Leading deep recess LDR Swirling was important near the leading apex seal for the LDR (70 ,71, 73) ( 74,75,76) Rear, Central and front The unidirectional flow field in the combustion chamber can be seen: rear, central and front. The swirling becomes developed Slow combustion and non-uniform mixing of fuel and air is what leads to long and incomplete combustion.…”

Section: Rear Middle Frontmentioning

confidence: 99%

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Combustion Chamber Design Effect on The Rotary Engine Performance - A Review

Boughou

Mohiuddin

2020

IJAE

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Comparatively, this review is meant to focus on possible developments studies of the rotary engine design. The controversial engine produces a direct rotational motion. Felix Wankel derived the triangular rotor shape from complex geometry of the Reuleaux triangle. The Wankel engine simulation and prediction of its performance is still limited. The current work reviews rotary engine's flow field inside the combustion chamber with different commercial software used. It studies different parameters effect on the performance of the engine, such as the effect of the recess sizes and the shape-factor. It is found that the engine chambers design is one of the aspects of improvement opportunities.

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Section: Intake Vorticesmentioning

confidence: 99%

Section: Computational Fluid Dynamics Cfd Approachesmentioning

confidence: 99%

Section: Rear Middle Frontmentioning

confidence: 99%

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Combustion Chamber Design Effect on The Rotary Engine Performance - A Review

Boughou

Mohiuddin

2020

IJAE

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“…and a two-dimensional model was constructed to investigate the influence of fuel type and recess size on the performance of a rotary engine [9].…”

Section: Abraham Et Al Measured the Indicator Diagrams Under Differementioning

confidence: 99%

Effects of hydrogen blending mode on combustion process of a rotary engine fueled with natural gas/hydrogen blends

Fan

Pan

Yang

et al. 2016

International Journal of Hydrogen Energy

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The highly advanced wankel rotary engine is a promising energy system because of its favorable energy to weight ratio, multi-fuel capability and large specific power output. This work aims to numerically study the performance, combustion and emission characteristics of a side-ported rotary engine fueled with natural gas/hydrogen blends under different hydrogen blending modes. Simulations were performed using multi-dimensional software FLUENT 14.0. On the basis of the software, a three-dimensional dynamic simulation model was established by writing dynamic mesh programs, choosing the RNG turbulent model, the eddy-dissipation concept (EDC) combustion model and a reduced reaction mechanism. The three-dimensional dynamic simulation model based on the chemical reaction kinetics was also validated by the experimental data. Meanwhile, further simulations were then conducted to investigate how to impact the combustion process by the coupling function between hydrogen distribution and the flow field inside the cylinder. Simulation results showed that in order to improve the combustion efficiency, the low-pressure early injection should be used as the hydrogen blending mode. The low-pressure early injection, not only allowed the hydrogen in the combustion chamber to be distributed evenly, but also resulted in the high concentration areas of hydrogen located at the front of the trialing spark plug, which can be used to increase the combustion rate. For the hydrogen low-pressure early injection, the improved combustion rate made in-cylinder pressure and the intermediate OH increase significantly. Compared with no hydrogen induction, it shows a 29% increase in the peak pressures. Meanwhile, the drawback is the increase Combustion Process of a Rotary Engine Fueled with Natural gas/Hydrogen Blends 3 in NO emissions.

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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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Where a licence is displayed above, please note the terms and conditions of the licence govern your use of this document. When citing, please reference the published version. Take down policy While the University of Birmingham exercises care and attention in making items available there are rare occasions when an item has been uploaded in error or has been deemed to be commercially or otherwise sensitive.

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The Numerical Investigation on the Performance of Rotary Engine with Leakage, Different Fuels and Recess sizes

Cited by 27 publications

References 0 publications

Combustion Chamber Design Effect on The Rotary Engine Performance - A Review

Combustion Chamber Design Effect on The Rotary Engine Performance - A Review

Effects of hydrogen blending mode on combustion process of a rotary engine fueled with natural gas/hydrogen blends

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

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