ptimization research of the exhaust height on aviation pistontwo-stroke gasoline engine

王蕾; 赵振峰; 俞春存; 张付军

doi:10.13224/j.cnki.jasp.2019.02.020

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ptimization research of the exhaust height on aviation pistontwo-stroke gasoline engine

更新时间：2026-07-07

- ptimization research of the exhaust height on aviation pistontwo-stroke gasoline engine
- Vol. 34, Issue 2, Pages: 442-450(2019)
- 作者机构：
  
  北京理工大学机械与车辆学院,北京,100081
- 作者简介：
- 基金信息：
- DOI：10.13224/j.cnki.jasp.2019.02.020
  CLC：
- Published：2019
- 稿件说明：
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王蕾, 赵振峰, 俞春存, 张付军. 航空活塞二冲程汽油机排气口高度优化研究[J]. 航空动力学报, 2019, 34(2): 442-450.

doi: 10.13224/j.cnki.jasp.2019.02.020
王蕾, 赵振峰, 俞春存, 张付军. 航空活塞二冲程汽油机排气口高度优化研究[J]. 航空动力学报, 2019, 34(2): 442-450. DOI： 10.13224/j.cnki.jasp.2019.02.020.

doi: 10.13224/j.cnki.jasp.2019.02.020 DOI：

摘要

针对作为无人机动力的某可变排气二冲程发动机在去掉可变排气系统后对发动机性能的影响，利用Fire仿真软件建立了发动机的缸内工作过程仿真模型，通过仿真和试验的方法研究了去掉可变排气系统后的发动机特性，结果表明：去掉可变排气系统后在2000r/min、10%节气门开度和5500r/min、50%节气门开度条件下，发动机的扫气效率降低，输出功率下降。在此基础上，利用仿真研究的方法对排气口高度参数进行了优化研究。去掉可变系统后排气口高度最优值为36.3mm时可以在保证常用无人机飞行转速范围内，各工况下扫气效率较高，发动机指示功损失最小，输出功率可以满足无人机动力需求。

Abstract

In order to study the influence on engine performance by a variable-exhaust two-stroke engine as the unmanned aircraft power with removal of the variable exhaust system

the simulation of the cylinder's working process in the engine was established using Fire simulation software. In the model

the characteristics of the engine after removing the variable exhaust system were studied through simulation and test. The results showed that after removing the variable exhaust system under the condition of 2000r/min

10% throttle opening and 5500r/min

50% throttle opening

the scavenging efficiency of the engine and the output power were reduced. On this basis

using the simulation study method to optimize the exhaust outlet height parameters

the results showed that: after removing the variable system

the optimal value of the exhaust outlet height was 36.3mm

which can guarantee the common drone flight speed range. The scavenging efficiency is high under all operating conditions. The loss of engine indicator power is minimal

and the output power can satisfy the drone power demand.

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Related Institution

State Key Laboratory of Automotive Safety and Energy,School of Mechanical Engineering,Tsinghua University

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School of Mechanical Engineering， Beijing Institute of Technology

Luoyang Northern Enterprises Group Company Limited，China South Industries Group Company Limited

南京航空航天大学能源与动力学院

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