超声珩磨区考虑煤油蒸气冷凝与蒸发的空化泡动力学分析

Dynamics Analysis of the Single Cavitation Bubble in Ultrasonic Honing Grinding Considering the Evaporation and Condensation of Kerosene Vapor

为了更深入地探究超声珩磨区空化泡的动力学特性,以煤油为磨削液介质,考虑煤油蒸气的冷凝与蒸发建立了功率超声珩磨下的单空化泡动力学模型。利用4阶龙格库塔法对不同工作条件(珩磨压力、珩磨头回转速度和往复速度、磨削液黏性、超声频率)下的空化泡泡壁运动规律进行了数值模拟与分析。研究表明:较高的珩磨压力、珩磨液黏性以及超声频率会抑制珩磨区空化效应的产生,而珩磨头回转速度与往复速度的变化对空化效果影响极其有限。

In order to explore the dynamic characteristics of cavitation bubble in ultrasonic honing area more deeply,dynamic model of cavitation bubble was established with consideration of evaporation and condensation of kerosene vapor,regarding the kerosene as the work medium. The movement law of cavitation bubble was simulated and analyzed by using 4 order Runge-Kutta method under different working conditions（ honing pressure,ultrasonic honing rotation and reciprocating speed,grinding fluid viscosity and ultrasonic frequency）. The results show that：with higher honing pressure,grinding fluid viscosity and ultrasonic frequency,the cavitation of honing area was inhibited. Besides,the influences of ultrasonic honing rotation and reciprocating speed on cavitation effect are extremely limited.