Numerical simulation of polygonal spiral curved pipe with abrasive flow machining based on large eddy simulation

Abstract

Abrasive flow machining (AFM) technology can achieve precision machining finish for processing special curved pipe parts. In order to study the processing effect of abrasive flow machining for special curved pipe parts, polygonal spiral curved pipe is taken as the research object. The large eddy simulation (LES) method is used to simulate and numerically analyze the processing of polygonal spiral curved pipe. The static pressure cloud diagram, turbulence kinetic energy cloud diagram and turbulence intensity cloud diagram under different inlet pressures are obtained to analyze the influence of inlet pressure on the workpiece processed by abrasive flow. The fluid trace diagrams are obtained at the inlet and outlet of the workpiece, and the vortex changes of the fluid inside the workpiece are analyzed. The mechanism of vortex variation is revealed, which provides theoretical support for practical processing in the future.