Simultaneous Observation of Combustion in Optical Rotary Engine by Bottom View and Side View

Karatsu, Y.; Minota, S.; Hashimoto, Hideki; Moriue, Osamu; Murase, Eiichi; Yun, Jyong Ho; Kagawa, Ryoji

doi:10.4271/2015-01-1891

Cited by 12 publications

(2 citation statements)

References 5 publications

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“…Karatsu et al developed an optical rotary engine fueled with gasoline to observe the combustion in cylinder. By using two high-speed cameras, the combustion in rotary engine was observed by bottom view and side view simultaneously [8]. A commercial computational fluid dynamics (CFD) software, FLUENT, was applied by Jeng et al…”

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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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

View full text Add to dashboard Cite

show abstract

“…Since the 1950s, beginning with the NSU, besides some companies [2,3], many institutions and researchers have paid attention to the research and development of Wankel engine [4,5]. It is clear that Mazda Corporation is the leading company for the latest developments in the automotive industry [6][7][8]. The main advantages of the Wankel-type rotary engine are higher specific power output and reduced vibration.…”

Section: Introductionmentioning

confidence: 99%

Two-Stroke Wankel Type Rotary Engine: A New Approach for Higher Power Density

Kutlar

Malkaz

2019

Energies

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The Wankel engine is a rotary type of four-stroke cycle internal combustion engine. The higher specific power output is one of its strong advantages. In Wankel rotary engine, every eccentric shaft revolution corresponds to one four-stroke cycle, whereas conventional reciprocating engine fulfills four-stroke cycle in two crankshaft revolutions. This means the power stroke frequency is twice that of conventional engines. Theoretically, application of two-stroke cycle on Wankel geometry will duplicate the power stroke frequency. In this research, a single-zone thermodynamic model is developed for studying the performance characteristic of a two-stroke Wankel engine. Two different port timings were adapted from the literature. The results revealed that late opening and early closing port geometry (small opening area) with high supercharging pressure has higher performance at low speed range. However, as the rotor speed increases, the open period of the port area becomes insufficient for the gas exchange, which reduces power performance. Early opening and late closing port geometry (large opening area) with supercharging is more suitable in higher speed range. Port timing and area, charging pressure, and speed are the main factors that characterize output performance. These preliminary results show a potential for increasing power density by applying two-stroke cycle of the Wankel engine.

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Control and measurement systems for spark ignition rotary engine

Zhao

Suo³

2019

Energ. Ecol. Environ.

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Simultaneous Observation of Combustion in Optical Rotary Engine by Bottom View and Side View

Cited by 12 publications

References 5 publications

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

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

Two-Stroke Wankel Type Rotary Engine: A New Approach for Higher Power Density

Control and measurement systems for spark ignition rotary engine

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