不同气流量下气泡帷幕对水下冲击波衰减特性研究  

Attenuation characteristics of bubble curtain on underwater shock waves under different air flow rates

作　　者：马成帅 吴红波[1] 王尹军[2] 陆少峰 李基锐 蔡心远 陈正严 MA Chengshuai;WU Hongbo;WANG Yinjun;LU Shaofeng;LI Jirui;CAI Xinyuan;CHEN Zhengyan(School of Chemical Engineering,Anhui University of Science and Technology,Huainan 232000,China;Beijing General Research Institute of Mining and Metallurgy,Beijing 100044,China;Guangxi New Harbor Engineering Co.,Ltd.,Nanning 530200,China)

机构地区：[1]安徽理工大学化学工程学院,安徽淮南232000 [2]北京矿冶研究总院,北京100044 [3]广西新港湾工程有限公司,南宁530200

出　　处：《振动与冲击》2024年第7期239-244,265,共7页Journal of Vibration and Shock

基　　金：广西重点研发计划(防科AB21014001)。

摘　　要：为了研究不同气流量下气泡帷幕对水下冲击波的衰减特性,采用高速摄像探究气泡帷幕在受到冲击波冲击后形态变化,结合冲击波压力时程曲线进行分析。结果表明,气泡帷幕中的气泡受到冲击波作用后会发生数次膨胀收缩行为,随着气流量增加,气泡膨胀的最大直径增大,第一次膨胀收缩周期变长;且气泡帷幕对水下冲击波压力有很强的衰减作用,气流量上升幅度越大,冲击波压力峰值衰减越明显,在气流量40 L/min下,冲击波峰值衰减高达88.98%;气流量大于20 L/min后,冲击波冲量衰减幅度均大于50.00%。针对气流量大小与压力峰值下降幅度的关系进行曲线拟合,提出适用于该工况下的经验方程,以期指导实际工程。Here,to study attenuation characteristics of bubble curtain on underwater shock wave under different air flow rates,high-speed videos were used to explore morphological changes of bubble curtain after being impacted by shock wave,and these changes were analyzed using shock wave pressure time history curve.The results showed that bubbles in bubble curtain undergo expansion and contraction behaviors several times after being subjected to shock wave;with increase in air flow rate,the maximum diameter of bubble expansion increases,and the first bubble expansion and contraction period becomes longer;bubble curtain has a strong attenuation effect on underwater shock wave pressure,the larger the increase in air flow rate,the more obvious the attenuation of peak shock wave pressure;under air flow rate of 40 L/min,attenuation of peak shock wave pressure can reach up to 88.98%;after air flow rate exceeds 20 L/min,attenuation amplitude of shock wave impulse is larger than 50.00%.Curve fitting was performed for the relation between air flow rate and pressure peak dropping amplitude,and an empirical equation suitable for this working condition was proposed to guide practical engineering projects.

关 键 词：气泡帷幕 高速摄像 冲击波峰值压力 曲线拟合 

分 类 号：TH212[机械工程—机械制造及自动化] TH213.3