海底冷泉渗漏气泡-海水两相介质均匀化方法和实验研究

摘要

针对海底冷泉天然气渗漏流量声波测量需要介质声阻抗均匀的要求,提出了气泡四元破碎方法,设计了一种气泡-海水两相介质均匀化装置.气泡-海水两相介质均匀化装置的功能包括两个部分:气泡破碎和气泡空间分布均匀化,其作用先将大气泡破碎成小气泡,然后再对小气泡的空间分布均匀化.实验结果表明:气泡-海水两相介质均匀化装置能够将直径大于15 mm的气泡破碎为当量直径为4~5 mm且空间分布均匀;另外气泡的流速基本在0.3~0.4 m/s内;达到天然气渗漏流量声波测量的要求.%As the method of measuring bubble flow from cool seeps on seafloor using acoustic transmission needs the media of homogeneity of acoustic impedance,the way of quaternary crushing bubbles is pro-posed and the biphase media of bubble-seawater homogenization device is designed.It includes two parts:bubble collapse and uniform distribution.The function of the biphase media of bubble-seawater homogenization device is that it can break big bubbles into small bubbles and let the small bubbles dis-tribute evenly.The results of experiment show that the biphase media of bubble-seawater homogenization device can break the diameter of bubbles greater than 15 mm into 4 ~5 mm and distribute them uniform-ly.The rising velocity of bubble is 0.3~0.4 m/s,which can satisfy the requirement of the method of measuring bubble flow from cool seeps on seafloor using acoustic transmission.