模具异型腔内超声空化特性的仿真研究

为进一步研究超声波对模具异型腔内气液混合相的作用,有效提高抛光效果,本文基于CFD,应用软件FLUENT6.3建立模具异型腔内超声抛光的模型。运用k-ε模型、气液两相流空化模型,模拟计算出模具异型腔内抛光介质在低压区的分布以及空化气泡的形成区域及其形成机理,确定了一定的空化现象的发生将有助于提高超声波抛光的精度。

Simulation of Ultrasonic Cavitation Characteristics in Mold Cavity

In order to further investigate the role of ultrasound on gas - liquid mixed phase in the mold cavity and im- prove the polishing result effectively, the software FLUENT6.3 is applied to establish ultrasonic polishing mold based on CFD. It is simulated for the distribution of polishing medium in the area of ？？ low pressure and formation region, mecha- nism of cavitation bubbles by k - 6 model and gas - liquid mixed phase cavitation model. The study identifies that a cavita- tion phenomenon is able to improve the accuracy of ultrasonic polishing.