亚临界水中超声激励空化泡动力学分析

考察亚临界水中压力和温度对超声空化泡动力学的影响。应用非线性Rayleigh-Plesset方程模拟空化泡运动过程,并利用Matlab软件编程求数值解,用碘量法测定超声在亚临界水中的声空化产额。结果表明:当亚临界水的压力

Dynamic analyses on cavitation bubbles driven by ultrasound in subcritical water

The effects of pressure and temperature in subcritical water for ultrasonic cavitation dynamics are investigated.The motion of bubble is simulated using the Rayleigh-Plesset equation and solved using the Matlab software.Ultrasonic cavitation generated in subcritical water is measured using the iodometric method.The results show that when the pressure of subcritical water is smaller than the amplitude of ultrasound,transient cavitation can occur,the maximum radius of cavitation bubble always reduces along with the increasing pressure,the temperature of subcritical water does not affect the exhibition of cavitation,but the maximum radius of cavitation bubble always reduces along with increasing temperature.Compared with normal water,the amplitude of ultrasound required to produce transient cavitation in subcritical water is higher than that of normal water.However,transient cavitation requires a shorter time to reach the same maximum radius of cavitation bubble.