航空活塞二冲程发动机的可变排气阀换气过程

郭栋; 骞剑策; 赵振峰

doi:10.13224/j.cnki.jasp.2020.03.003

航空活塞二冲程发动机的可变排气阀换气过程

doi: 10.13224/j.cnki.jasp.2020.03.003

基金项目: 深圳市科技创新基金(JCYJ20170817114345260)

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出版历程
- 收稿日期: 2019-09-02
- 刊出日期: 2020-03-28

Ventilation process of variable exhaust valve of aviation piston two-stroke engine

1.
School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China
2.
Shenzhen Institute of Technology,Beijing Institute of Technology,Shenzhen Guangdong 518057,China

摘要

摘要: 航空活塞二冲程发动机的换气过程直接影响发动机的性能,采用可变排气阀可以改善发动机的动力性能。通过GT-Power软件搭建发动机一维整机模型,进行可变排气阀的仿真研究,分析了发动机在不同转速、不同排气阀状态下的换气过程及排气阀状态对换气过程的影响。在此基础上,还对定速巡航工况下(6500r/min转速、50%节气门开度)的排气阀状态进行了优化。结果表明:不同的排气阀状态可以改变发动机排气过程压力波动的相位,从而影响发动机的换气品质及燃烧过程;在定速巡航工况下,排气阀为中等开度时(初级阀关闭、次级阀开启),其发动机动力性能达到最优。
- 可变排气 /
- 换气过程 /
- 二冲程 /
- 压力波动 /
- 活塞发动机
Abstract: The ventilation process of the aviation piston two-stroke engine directly affects the engine performance, and the variable exhaust valve can improve the dynamic performance of engine. Through the GT-Power to build the one-dimensional engine model, simulation research about ventilation process of the engine at different speeds and different exhaust valve stages was carried out, and the influence of exhaust valve stage on the ventilation process was analyzed. On this basis, the stage of the exhaust valve under constant speed cruise conditions (speed of 6500r/min, 50% throttle opening) was also optimized. The results show that different exhaust valve stage can change the phase of pressure fluctuations during engine exhaust process, thereby affecting the engines ventilation quality and combustion process; under constant speed cruise conditions, when the exhaust valve is at medium stage (primary valve is closed, secondary valve is open), engine power performance is the best.
- variable exhaust /
- ventilation process /
- two-stroke /
- pressure fluctuation /
- piston engine

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参考文献(18)

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