钝体/阻流孔式气动阀工作机理及流阻特性研究  

Research on mechanism and flow drag character of an aerodynamic valve with blunt block and backflow damping orifices

作　　者：李海鹏[1] 何立明[1] 李天亮[1] 蒋永健[1] 武卫[1] 

机构地区：[1]空军工程大学工程学院,西安710038

出　　处：《航空动力学报》2008年第8期1480-1485,共6页Journal of Aerospace Power

摘　　要：针对脉冲爆震发动机的工作特点构思了一种钝体-阻流孔式气动阀,对该气动阀的工作机理进行了分析,通过二维数值方法初步研究了该气动阀的流场分布情况及流阻特性.结果表明:该气动阀具有良好的单向性,出口压力为100 kPa时,该气动阀在来流压力100 kPa<p<500 kPa工作条件下正向流动顺畅,反向流动时,流动阻力随来流压力的升高线性增大.真实爆震环境的数值模拟结果显示,该气动阀的单向性、掺混效果、出口流场均匀度明显提高,反向流动阻力显著增大.An aerodynamic valve with blunt block and backflow damping orifices was designed for pulse detonation engines （PDEs）, and its mechanism was analyzed. The flow field in the aero-valve and the flow drag character were examined numerically. The result shows that the valve presents good single-direction flow performance. The flow is found moving smoothly to the detonation chamber when the pressure at the valve inlet is between 100 kPa and 500 kPa. However the drag rises linearly along with the increase of the inlet pressure when the flow direction is reversed. The simulation results in detonation environment show that, the single-direction flow performance, the mixing quality and the exit flow field uniformity of the aerodynamic valve will be enhanced greatly, and the backflow drag rises dramatically.

关 键 词：脉冲爆震发动机(PDE) 气动阀 流阻特性 

分 类 号：V231.202[航空宇航科学与技术—航空宇航推进理论与工程]