含气泡液体中声场能量的传播

Propagation of Sound Energy in Bubbly Liquids

摘要: 针对声波在含气泡液体中的传播问题，提出一种从能量传播角度建立声场传播模型的思路。将气泡的振动及声场的机械能结起来建立含气泡液体中声场的能量传播模型，并利用该模型对由于单个气泡空化引起气泡的机械能变化情况、驱动声场的机械能损失情况及声场的传播受气泡振动的影响进行了数值模拟。研究发现，单个气泡在振动过程中的体积变化越剧烈，其机械能的变化就越明显，对应的驱动声场的机械能损失就越大；如果气泡在驱动声场的作用下发生空化，则会在声源附近形成一个受气泡多少及声场强度影响的区域。最终认为含气泡液体中声场能量传播模型的提出及应用可以较方便地用来处理声场在含气泡液体中的传播问题。

Abstract: Aiming at the problem of sound wave propagation in bubbly liquids, an idea of using energy propagation to establish a model is proposed. The vibration of the bubble and the mechanical energy of the sound are combined to establish an energy propagation model of the sound field in the bubbly liquids, and the model is used as a single numerical simulation of the mechanical energy change of the bubble caused by bubble cavitation, the mechanical energy loss of the driven sound field and the influence of bubble vibration on the propagation process of the sound field during the model Through numerical analysis, it’s found that the more the volume change of a single bubble during the vibration process, the more obvious the change of mechanical energy, and the greater the mechanical energy loss of the corresponding driving sound field; if the bubble is cavitation under the action of the driving sound field, a small cavitation area is formed near the sound source, and the size of the area is affected by the number of bubbles and the intensity of the sound field. Finally, the proposed and applied sound field energy propagation model in bubbly liquids can be conveniently used to deal with the propagation of sound fields in bubbly liquids.