前混合磨料高压水射流切割喷嘴的数值模拟

为了延长喷嘴的使用寿命,提高水射流设备的使用效率,对前混合磨料高压水射流的喷嘴结构进行了优化设计.利用CFD软件对几种典型喷嘴的内部流动进行了数值模拟和仿真,得到了压力分布图、速度分布图、紊动能分布图及轴线上轴向速度图等仿真结果.对仿真结果进行了对比分析,得出了结构型式较好的喷嘴,为耐久喷嘴的研制提供了依据.分别用3种喷嘴做了一系列的试验,并与仿真结果进行了对比,证明仿真结果是准确的.

Numerical simulation of pre-mixed abrasive high pressurewater jet cutting nozzle

To pr olong the l ife of nozzle and r aise the ef ficiency o f the w ater jet equipment , the desig n ofnozzles used in PMAHPWJ ( pre-mixed abrasive high pressure w ater jet ) equipment w as optimized. T heinterior flow of several typical nozzles w as simulated w ith CFD sof tw are, and a ser ies of simulat ion datumsuch as pressure dist ribut ing , v elo city dist ribut ing , turbulent kinet ic energy distr ibuting and axis-orientedvelocity dist ribut ing on the ax is w ere g ained. Af ter the analyses o f ev ery simulation, the bet ter no zzlest ructure was draw n o ut w hich may of fer evidences for the design of perdurable nozzles. T he simulationresult s pro ve to be ex act by a series of experiment s w ith the three no zzles.