中文摘要：

针对水下垂直向上喷射的气体射流在潜射导弹破水发射装置（WPML）中的应用,对其气体射流的基础理论及关键技术进行了实验研究。实验得出气体射流时动量射流段的射流直径是以近线性速率增大的结论,并分析了动量射流长度与斯特鲁哈数之间的某种相关性。结果指出,随着射流出口速度的增加,可以减小斯特鲁哈数,射流的周期不稳定性明显减弱,得到稳定且长度较长的射流,对WPML的设计和应用具有参考作用。

英文摘要：

The paper presents an experimental research on high-speed underwater gas jets injection techniques,which are applied in water piercing missile launcher（or WPML）.Through analyzing the experimental data acquired,the authors find that the diameter of gas flow passage increases in linear rate in the momentum jet section.Also the authors analyze the relation about the length of momentum jet with Strouhal number.The research result indicates that increasing the jet exit velocity can reduce Strouhal number and weaken the periodic unstability,and finally steady and long jet may be obtain.The characteristic study of momentum jet may be helpful to the design and application of the WPML.