脉冲爆震发动机倒旋流气动阀数值与实验研究

宫继双; 范育新; 王家骅; 占欢; 张靖周

脉冲爆震发动机倒旋流气动阀数值与实验研究

南京航空航天大学能源与动力学院, 南京 210016

基金项目: 基础预研项目

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出版历程
- 收稿日期: 2010-05-05
- 修回日期: 2010-08-27
- 刊出日期: 2011-08-28

Numerical and experimental study on inversing-rotating aero-valves of PDE

College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China

摘要

摘要: 为了减小脉冲爆震发动机爆震燃烧时气动阀的倒流量,提出一种倒旋流气动阀,给出了不同倒流旋流数下模型气动阀的流动分析.结果表明:对于几何尺寸给定的气动阀,存在一个最佳的旋流数,此时气动阀的单向阀性能最好,气动阀的最佳旋流数约为1.0.此外,设计了旋流数为1.364的气动阀,进行了实验,冷态实验结果验证了数值方法的可靠性;热态实验表明采用该气动阀可以在直径114mm的爆震管获得频率为40Hz稳定的爆震波.
- 脉冲爆震发动机 /
- 气动阀 /
- 倒旋流气动阀 /
- 旋流数 /
- 爆震频率
Abstract: As a new concept aero-valve used in pulse detonation engine (PDE),inversing-rotating aero-valve was mentioned to improve one-way performance of the valve in this paper.A useful inclusion was obtained after a series of numerical investigation,that is,the swirl number is the key parameter affected the valve's performance.The optimum value of swirl number is approximately one.In addition,an aero-valve which swirl number equals to 1.364 was made to experiment.The experimental results without ignition demonstrate the conclusion revealed by numerical way.Finally,detonation waves at the operating frequency of 40Hz are obtained in a tube with inner diameter 114mm.
- pulse detonation engine /
- aero-valve /
- inversing-rotating aero-valve /
- swirl number /
- detonation frequency

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参考文献(23)

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