Flow field simulation and experiment of pre-mixed abrasive water jets outside the nozzle

Based on the finite element model of the pre-mixed abrasive water jet(AWJ) nozzle,numerical simulation of flow field outside AWJ nozzle with two different diameters was studied.The results indicate that exit diameter influences the nozzle velocity relatively larger,and the nozzle velocity decreases with increasing diameter while keeping other geometry construction parameters changeless.It would increase the AWJ velocity at nozzle exit by increasing the length of nozzle mixing tube properly.The optimal cutting distance of the AWJ is 2.0~5.0 times the nozzle exit diameter.The AWJ experimental cutting target results accord with the impacting simulation device on the whole.