关键词: 软性磨粒流;超声波;欧拉模型;空化;数值模拟;轮廓提取;粒子成像测速;加工试验

Abstract: Aiming to solve the problem of long time processing and inefficient on solid-liquid two phase softness abrasive flow, a new research method of ultrasound-enhanced mechanism is put forward, which is based on the Euler-Euler multiphase flow model and the two-equations model. The coupling model of sound field and flow field is established. The flow rate, pressure and velocity of softness abrasive flow loaded ultrasonic are analyzed by using CFD. The pressure and velocity distributions of the abrasive flow can be obtained. Canny, an operator is used to find the edge of contour. The spur combined Bwmorph performance function is removed to get the clear edge of numerical simulation figure. The particle image velocimetry(PIV) using the three dimensional display system is designed to research the changes in the flow. It is found that there are numerous of cavitation bubble growing and hitting the wall continuously, and the resultion of simulation and PIV experiment is matched. The ultrasonic wave on the soft abrasive flow, to some degree, reduces the machining time and raise the machining efficiency.

Key words: softness abrasive flow;ultrasound wave;Euler model;cavitation;numerical simulation;rough sketch extraction;particle image velocimetry;processing experiment