Abstract: To investigate effects of supersonic gas jets under water, gas generator and underwater testing system is used to study the growth and evolution of gas bubble by supersonic gas jets and pressure pulse propagation characteristics under water. The characteristic of pressure pulse attenuation is investigated. The experimental results show that the growth and collapse of the gas bubble cause the pressure pulse, and the pulsation can quickly decay under water. 

Key words: Supersonic gas jet; Underwater; Gas bubble; Pressure wave; Propagation

摘要： 为获取燃气射流对上游水域的影响特性,采用燃气发生器和水下实验系统,研究了水下超声速燃气射流的气泡生长及演变过程,以及气泡压力波在水中的传播特性,并研究了压力波在水介质中的衰减规律。研究表明,燃气泡生长和“破碎”伴生着压力脉动在水介质中传播,气泡压力波的能量在水介质中快速衰减。

关键词: 超声速燃气射流;水下;气泡;压力波;传播特性