脉冲爆震发动机倒旋流气动阀数值与实验研究  

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

作　　者：宫继双[1] 范育新[1] 王家骅[1] 占欢[1] 张靖周[1] 

机构地区：[1]南京航空航天大学能源与动力学院,南京210016

出　　处：《航空动力学报》2011年第8期1719-1727,共9页Journal of Aerospace Power

基　　金：基础预研项目

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.

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 

分 类 号：V235.223[航空宇航科学与技术—航空宇航推进理论与工程]