水下超声速燃气射流气泡的生长及压力波传播特性实验研究

汤龙生; 刘宇; 吴智锋; 赵文胜

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水下超声速燃气射流气泡的生长及压力波传播特性实验研究
汤龙生¹, 刘宇¹, 吴智锋², 赵文胜²
1.北京航空航天大学宇航学院,北京 100191;2.北京动力机械研究所,北京 100074

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

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Experimental study on characteristics of bubble growth and pressurewave propagation by supersonic gas jets under water

TANG Long-sheng¹, LIU Yu¹, WU Zhi-feng², ZHAO Wen-sheng²

1.School of Astronautics, Beijing Univ.of Aeronautics and Astronautics, Beijing 100191, China;2.Beijing Power Machinery Research Inst., Beijing 100074, China

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