YIN Yanlu1, TENG Qi2, LI Jun ye1, ZHANG Xin ming1, DONG Kun1, ZHOU Li bin1

(1.College of Mechanical and Electrical Engineering, Changchun University of Science and Technology, 

Changchun 130022, China；2.College of Mechanical and Electrical Engineering, 

Northeast Forestry University, Harbin 150040, China)

 

 

Abstract: Aiming at investigating the effect of velocity on grinding results and the problem of non uniform grind in nonlinear tube component, the fluid dynamics software Fluent was applied with building the Eulerian Eulerian mathematic model solid liquid the phase flow of large eddy simulation and choosing simple arithmetic to research on the numerically simulate under flow condition of abrasive flow with different entrance velocity in U tube. The distribution maps of static pression, boundary stress and turbulence viscosity in six different entrance velocity were compared and the velocity distribution vector diagram was analyzed with same entrance conditions and velocity distribution sectional view in different location of U tube. The results indicate that increasing entrance velocity is beneficial to improve abrasive flow machining efficiency on the internal surface of U tube. Especially, the grinding results of entrance are more uniform; the cross section from 0°to 30°in bend region of internal surface is better than external surface and from 60°to 180°is opposite; exit section of external surface is better than internal surface.

 

Key words: abrasive flow; U tube; Eulerian Eulerian; large eddy simulation