| 袁月,苗博雅,安宇.声波在含气泡液体中传播特性及产热效应*[J].,2018,37(5):717-721 |
| 声波在含气泡液体中传播特性及产热效应* |
| Investigation on sound transmission and heat production in bubbly liquid |
| 投稿时间：2018-06-10 修订日期：2018-08-17 |
| 中文摘要: |
| 本文对含气泡液体中的声波方程采用线性分析方法,研究了超声波在含气泡液体中的传播特性以及产热效应。当声波在含气泡液体中传播时,气泡的存在会影响声波的传播,在声波频率接近气泡共振频率的频段内,声信号在液体中传播时剧烈衰减,而在声波频率远远高于或低于气泡共振频率时,声波的传播基本不受影响。在接近气泡共振的频段内,声波耗散的能量最终转化为热能。同时液体中的气泡会在声波驱动下径向振动并辐射声波,伴随气泡壁在液体中的粘滞振动,热量随之产生。结果表明,两种产热机制分别在不同频段起主导作用。 |
| 英文摘要: |
| Using a linear analysis of a nonlinear equation governing soundwave propagation in bubbly liquids, we study the propagation character and heat production of ultrasound wave in bubbly liquid. The bubbles have a big influence on the propagation of soundwaves. When the ultrasound frequency is close to the resonant frequency of bubbles, the acoustic dissipation absorbing effect of the bubbly liquid is strong, and the energy is mainly dissipated in the form of heat. On the other hand, ultrasound wave drives bubbles pulsate while propagating through the bubbly liquid, as a consequence, bubbles radiate soundwaves. At the same time, the viscous dissipation at the interface between liquid and gas is supposed to contribute to heat production. As the results show, these two different heating mechanisms are dominant in different frequency ranges respectively. |
| DOI：10.11684/j.issn.1000-310X.2018.05.016 |
| 中文关键词: 含气泡液体,产热效应,传播特性 |
| 英文关键词: Bubbly liquid, Heat production, Propagation character |
| 基金项目:国家自然科学基金项目 (11334005) |
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