Abstract:Based on CFD theory, a mathematical model of liquidsolid two phase flow field and erosion for slide valve of high pressure multiway valve were established. Through simulation on the flow field of the slide valve under the different valve spools with microgroove and pressure groove respectively, the tribological performance of two valve spools were analyzed, Including leakage, axial friction caused by clamping force, wall friction and wear rate. The results of numerical simulation were compared with that of the engineering practice. The results show that the leakage, wall friction and wear rate of the valve spool used micro groove surface texture technology are reduced, and the maximum axial friction caused by clamping force is slightly greater, compared with the pressure groove. The tribological performance of microgroove is better than that of pressure groove. Seen that the microgroove surface texture technology can effectively improve the service life of high pressure multiway valve. SST kω model and DPM model can effectively simulate the flowing law of liquidsolid twophase flow of slide valve.