亚临界水中的超声空化泡动力学研究

Study on the Dynamics of Ultrasonic Cavitation Bubbles in Subcritical Water

为探究超声空化泡在亚临界水中的动力学行为,本文基于流体控制方程和多相流模型,使用计算流体力学仿真软件对亚临界水中的超声空化泡进行建模与数值仿真,研究了空化泡从在运动过程中的形态变化,以及流体区域内速度,压力的分布变化,并对影响空化泡动力学行为的因素进行探究。结果表明,在同等条件下,常温水中的空化效果比亚临界水中的空化效果更好;在同样的频率,振幅的超声中,流体压力越小,温度越高,空化程度越剧烈。

In order to explore the dynamic behavior of ultrasonic cavitation bubbles in subcritical water,this paper uses computational fluid dynamics simulation software to complete the modeling and numerical simulation of cavitation bubble in subcritical water based on fluid control equations and multiphase flow models.The morphological changes of cavitation bubbles during the movement process,and the distribution changes of velocity and pressure in the fluid region are studied.The factors affecting the dynamic behavior of cavitation bubbles are investigated.The results show that the cavitation effect of normal temperature water is better than that of critical water under the same conditions.At the same frequency and amplitude,the lower the fluid pressure,the higher the temperature,and the more severe the cavitation.