Combined effect of intake angle and chamber structure on flow field and combustion process in a small-scaled rotary engine

Zou, Run; Liu, Jinxiang; Jiao, Huichao; Zhao, Jingjing; Wang, Nana

doi:10.1016/j.applthermaleng.2021.117652

Cited by 20 publications

(4 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With this meshing mode, the minimum mesh size is less than 0.625 mm. Studies have shown that the flow field and flame could be accurately captured using this grid size for engines of the same size [4,29]. The mesh model generated during the calculation is shown in Figure 3.…”

Section: Mesh Generationmentioning

confidence: 99%

“…The second category is the wall boundary conditions of the simulation model. The wall boundary conditions adopted in this study are set according to the one-dimensional simulation results and comprehensive consideration of references [4,8,31]. The conditions of the calculation area except for the intake port, exhaust port, and the rotor were fixed wall boundary.…”

Section: Boundary Conditions and Simulation Modelsmentioning

confidence: 99%

“…Compared with conventional reciprocating engines, Wankel rotary engines (WREs) have many advantages, such as simple structure, compact design, light weight, high power-toweight ratio, and low noise [1][2][3]. Owing to the above advantages, WREs have been widely used in military and civilian areas in recent years, including mobile generators, expander power, and small-scaled unmanned aerial vehicle (UAV) [4,5]. Although WREs have been widely used in many fields, there are still some disadvantages that limit the further expansion of its application.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of In-Cylinder Low-Pressure Direct Injection Strategy on the Atomization and Combustion Process of a Small-Scaled Gasoline Wankel Rotary Engine

Liu

Huang

et al. 2023

International Journal of Energy Research

Self Cite

View full text Add to dashboard Cite

To solve the problem of poor atomization and combustion in a small-scaled gasoline Wankel rotary engine (WRE) with low-pressure port injection mode, the numerical simulation was used to optimize the injection strategy. Firstly, the effects of in-cylinder temperature and pressure on gasoline atomization characteristics were studied, and the optimal injection timing was determined. Based on this, the influence of injection position, injection angle, and installation direction on the atomization, fuel-air mixing, and combustion processes of low-pressure direct injection (DI) small-scaled gasoline WRE was investigated. The results show that the injection angle is a key factor in determining the gasoline atomization characteristics. Injecting along the direction of rotor rotation causes the impingement between fuel bundle and combustion chamber pocket, resulting in the smaller Sauter mean diameter (SMD) and liquid penetration length (LPL). The installation direction of nozzle plays an important role in the airflow movement. When the nozzle is vertical-installed, the airflow repeatedly crosses to form multiple eddies, making the fuel to move more easily towards the front of combustion chamber. When the nozzle is parallel-installed at the lower edge of the installing zone and injecting along the direction of rotor rotation, the peak in-cylinder pressure is the largest and increased by 21% compared to the original port injection. By this injection strategy, the problem of incomplete combustion for the studied small-scaled gasoline WRE could be almost completely solved.

show abstract

Section: Mesh Generationmentioning

confidence: 99%

Section: Boundary Conditions and Simulation Modelsmentioning

confidence: 99%