无阀式脉冲喷气发动机性能预示简化模型

魏韬; 武晓松; 蔡文祥

无阀式脉冲喷气发动机性能预示简化模型

南京理工大学机械工程学院航空宇航系,南京 210094

基金项目: 中国博士后基金(20080441055)

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出版历程
- 收稿日期: 2011-02-27
- 修回日期: 2011-06-29
- 刊出日期: 2012-01-28

Simplified analytical models for performance prediction of valveless pulsejet

Department of Aeronautics and Astronautics, School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China

摘要

摘要: 通过分析无阀式脉冲喷气发动机工作循环,建立发动机工作过程的简化物理数学模型.获得了进气过程的燃烧室流动方程以及平均排气速度与燃气热力参数和燃烧室压力之间的关系,进而给出发动机工作频率和平均推力表达式.结果表明:无量纲平均排气速度随压缩比p_max/p₀的增加而增加,且趋势变缓;工作频率和平均推力的预测值与实验值的误差分别不超过10%和±17%;此外,获得的推力公式对有阀式发动机也有一定适用性.研究表明:对发动机工作过程的简化分析是合理的,简化模型的计算精度在可接受范围之内.所得结论对无阀式发动机的设计、实验、性能预示和优化均有指导意义.
- 脉冲喷气发动机设计 /
- 性能预示 /
- 简化模型 /
- 工作频率 /
- 平均推力
Abstract: The simplified physical and mathematical models of the working process in valveless pulsejet based on the analysis of such engine cycle were proposed.The flow principle of combustor of charging process and the relationship of the mean velocity of discharge with thermodynamic parameters and combustor pressure were achieved,then the equations of the operation frequency and mean thrust were given.The results show that non-dimensional mean velocity of discharge increases with the increase of the compression ratio,and tendency is mitigated;the errors between the results of operation frequency and mean thrust models and experimental data are less than 10% and ±17%;in addition,the equation of thrust is suitable for valved pulsejet.The study shows that presented simplified analytical models are reasonable,and the accuracy is acceptable.The conclusions offer instruction for designing,experiment,predicting the performance and optimization method of valveless pulsejet.
- pulsejet design /
- performance prediction /
- simplified model /
- operation frequency /
- average thrust

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参考文献(16)

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