脉冲爆震发动机倒旋流气动阀数值与实验研究

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.

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

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...