气泡帷幕距离与供风量对水中冲击波衰减特性的影响研究
基金项目:
安徽省高校科学研究项目(KJ2021A0431)；广西重点研发计划（桂科 AB22035001）；安徽省自然科学基金(1908085QA33)。
Study on the Influence of Bubble Curtain Distance and Air Supply Volume on the Attenuation Characteristics of Underwater Shock Wave
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摘要:为研究气泡帷幕距离与供风量对水中冲击波衰减特性的影响，采用AUTODYN有限元软件对防护距离为0.7，0.5，0.3 m，供风量为40，80，120 L·min-1的气泡帷幕作用下的水中冲击波峰值超压、比冲量和比冲击波能进行了仿真研究，并进行了试验验证。结果表明：随着防护距离的减小和供风量的增大，气泡帷幕对水中冲击波峰值超压、比冲量和比冲击波能的衰减作用明显增大；相较于冲击波峰值超压和比冲量，气泡帷幕对比冲击波能的衰减作用更明显；相对于空白组，气泡帷幕供风量为120 L·min-1且防护距离为0.3 m时，冲击波峰值超压、比冲量、比冲击波能的衰减率最大，分别为91.00%、90.13%、98.97%。
Abstract:To investigate the influence of bubble curtain distance and air supply volume on the attenuation characteristics of underwater shock wave, AUTODYN finite element software was used to simulate the peak overpressure, specific impulse, and specific shock wave energy of underwater shock wave under the action of bubble curtains with protection distances of 0.7, 0.5, 0.3 m and air supply volumes of 40, 80, 120 L·min-1, and the test verification was conducted. The results show that as the protection distance decreases and the air supply volume increases, the attenuation effect of the bubble curtain on the peak overpressure, specific impulse, and specific shock wave energy of underwater shock wave significantly increases; Compared to the peak overpressure and specific impulse of shock waves, bubble curtains have a more significant attenuation effect on specific shock wave energy; Compared to the blank group, when the air supply volume of the bubble curtain is 120 L·min-1 and the protection distance is 0.3 m, the attenuation rates of peak overpressure, specific impulse, and specific shock wave energy of the shock wave are the highest, which are 91.00%, 90.13%, and 98.97%, respectively.
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