耦合超声场的气液固三相磨粒流多物理场数值模拟研究

针对气液固三相磨粒流抛光研究中流场分布不均问题,对气液固三相磨粒流中的湍流分布、湍流峰值分布、能量分布、温度分布和加工质量等方面进行了研究,对气液固三相磨粒流的抛光方法和抛光问题进行了归纳,提出了一种耦合超声场的气液固三相磨粒多物理场数值模拟方法,利用超声场的交变声压增加了气液固三相磨粒流流场的扰动,改变了流场分布。研究结果表明:不同的超声频率和声压幅值会带来不同的流场分布,其中频率为20 k Hz、声压幅值为30 k Pa的超声场所得的流场分布最优。该研究成果对气液固三相磨粒流抛光方法的推广与实际运用具有重要意义。

Multiphysical field numerical simulation of gas-liquid-solid three phase abrasive particles under coupled ultrasonic field

Aiming at the problem of uneven distribution of flow field of gas-liquid-solid three phase abrasive flow polishing, the distribution of turbulent flow, turbulent peak, energy, temperature and processing quality in gas liquid solid three-phase abrasive particle flow were re-searched, the polishing method and polishing problem of gas liquid solid three-phase abrasive flow were summarized, and a multiphysical field numerical simulation method was proposed for gas-liquid-solid three phase abrasive particles under coupled ultrasonic field. By using the alternating pressure of ultrasonic field, the flow field of gas-liquid-solid three phase abrasive particles was increased to chance the flow field distribution. The results indicate that different ultrasonic frequency and sound pressure intensity have different results. Among the different ultrasonic frequency and sound pressure intensity, the ultrasonic frequency of 20kHz and the sound pressure amplitude of 30kPa can obtain the optimal flow distribution. This study is of great significance to the promotion and practical application of gas-liquid-solid three phase abra-sive particles flow polishing method.