在许多工程应用中都需了解流体的自激振荡特性 ,而其振荡频率与压力波传播速度密切相关。笔者从理论上分析了自激振荡射流中碰撞剪切流动压力扰动波的传播速度及其对射流振荡频率的影响规律 ,结果表明 :波速随着流体中气体含量的增加而急剧减小 ,随压力的增大而增大。波速减小使得射流的振荡频率也减小 ,实验结果与理论分析一致 In many engineering applications need to understand the self-oscillating fluid properties, and its oscillation frequency and pressure wave propagation velocity are closely related. The author analyzes theoretically the propagation velocity of perturbation wave of impinging shear flow pressure in self-oscillating jets and its influence on the jet oscillation frequency. The results show that the velocity of wave decreases sharply with the increase of gas content in the jet, Increase and increase. The decrease of wave velocity makes the oscillation frequency of the jet decrease. The experimental results are consistent with the theoretical analysis