腔式流线型脉冲喷嘴特性的研究

CHARACTERISTICS OF RESONANT STREAMLINE NOZZLES

对腔式流线型喷嘴的射流特性进行了实验研究，结果表明，型面不同的流线型喷嘴的射流结构都与一般喷嘴射流相类似，即由初始段、基本段组成，但其等速核较短．这种具有振荡腔、能产生谐振的喷嘴．能够产生较大的自激振荡脉冲．给出了三种喷嘴的形状参数及时均速度分布规律的数学表达式。

The jet structures of streamline nozzles with different model surfaces weresimilar to the general nozzles, This kind of jet is composed of beginning section and basicsection. But its cores with equal velocities and the optimun jet distance were shorter.Thestudy shows that the streamline nozzles can make the bigger self-resonant pluse.Theparameters of shape and the mathematic expressions of velocities disributions of three kinds ofnozzles were given in the paper.The peak value distributions were presented.