不同气流量下气泡帷幕对水下冲击波衰减特性研究

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Abstract In order to study the attenuation characteristics of the bubble curtain on the underwater shock wave under different air flow rates, the morphological changes of the bubble curtain after the shock wave were explored by using high-speed photography, and the analysis was carried out based on the time-history curve of the shock wave pressure. The results show that the bubbles in the bubble curtain will expand and contract several times after being subjected to shock wave. With the increase of gas flow rate, the maximum diameter of bubble expansion increases and the first period of bubble expansion and contraction becomes longer. And the bubble curtain has a strong damping effect on the underwater shock wave pressure. The larger the gas flow rate rises, the more obvious the peak attenuation of shock wave pressure is. Under the gas flow rate of 40L/min, the peak attenuation of shock wave pressure is as high as 88.98%. When the gas flow rate is greater than 20L/min, the attenuation amplitude of shock wave impulse is greater than 50%. Based on the curve fitting of the relationship between the gas flow rate and the drop range of the peak pressure, the empirical equation suitable for the working condition is put forward in order to guide the practical engineering.

Key words： bubble curtain High-speed photography Shock wave peak pressure Curve fitting

Received: 04 May 2023 Published: 15 April 2024

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	Articles by authors
	MA Chengshuai1
	WU Hongbo1
	WANG Yinjun2
	LU Shaofeng3
	LI Jirui3
	CAI Xinyuan1
	CHEN Zhengyan1

Cite this article:

MA Chengshuai1,WU Hongbo1,WANG Yinjun2, et al. Attenuation characteristics of bubble curtain on underwater shock waves under different air flow rates[J]. JOURNAL OF VIBRATION AND SHOCK, 2024, 43(7): 239-244.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2024/V43/I7/239

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