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114 mm的爆震管获得频率为40 Hz稳定的爆震波.
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 40 Hz are obtained in a tube with inner diameter 114 mm.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2011年第8期1719-1727,共9页
Journal of Aerospace Power
基金
基础预研项目
关键词
脉冲爆震发动机
气动阀
倒旋流气动阀
旋流数
爆震频率
pulse detonation engine； aero-valve； inversing-rotating aero-valve； swirl number； detonation frequency
