超声珩磨区实际气体的单空泡动力学分析

为进一步揭示功率超声振动的珩磨机理,以珩磨液为工作介质,研究了功率超声珩磨环境中实际气体的单空泡动力学特性。基于Rayleigh-Plesset方程,应用实际气体绝热方程和范德瓦尔斯方程对其进行了修正,建立了功率超声珩磨环境中实际气体的单空泡动力学方程以及实际气体单空泡共振频率方程。并运用4~5阶RungeKutta法模拟了不同超声条件(声压幅值、空泡初始半径、振动频率)对泡壁的运动以及运动速度的影响。结果表明:较高的声压幅值,空泡理论共振半径R'0与初始半径R0的比值为102数量级以及较低的超声频率有利于超声珩磨磨削区空化效应的发生。

Single bubble dynamics analysis of the real gas in ultrasonic honing area

In order to reveal the mechanism of power ultrasonic vibration honing, the single bubble dynamic characteristics of the real gas was researched in honing liquid. Rayleigh-Plesset equation was modified by the real gas adiabatic equation and van der Waals equation.The single bubble dynamics equations of real gas in ultrasonic honing environment was established.The effects of different ultrasound conditions(sound pressure amplitude, the initial bubble radius, vibration frequency)to motion and velocity of the bubble wall was simulated by using 4-5 order Runge-Kutta method. The results show that: the higher the sound pressure amplitude, resonance cavity near the size of the initial radius and lower ultrasonic frequency was advantaged to the cavitation effect occured in the ultrasonic honing zone.