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为了提高射流加工效率,提出使用多喷头结构来提高工件的去除效率。根据流体力学原理,从理论上分析了多喷嘴冲击射流复合流场的结构特性,对不同喷嘴数目复合流场的流场分布进行了定量计算;针对复合流场的特性进行了模拟研究,得到工件壁面流体速度、压强的分布曲线。建立了单喷嘴、三喷嘴和七喷嘴的材料去除理论模型,并对去除量分布进行了计算和比较。结果表明,当冲击高度为10d,喷嘴间距为5d时(d为射流喷嘴直径),三喷嘴模型材料去除率是单喷嘴模型材料去除率的2.16倍,七喷嘴模型材料去除率是单喷嘴模型材料去除率的4.25倍。
In order to improve the jet processing efficiency, the use of multiple nozzle structure is proposed to improve the removal efficiency of the workpiece. According to the principle of fluid mechanics, the structural characteristics of multi-nozzle impinging jet composite flow field are theoretically analyzed, and the flow field distribution of different nozzle number composite flow field is quantitatively calculated. The characteristics of the composite flow field are simulated and the work piece Wall fluid velocity, pressure distribution curve. The material removal theoretical models of single nozzle, three nozzles and seven nozzles were established, and the removal distribution was calculated and compared. The results show that when the impact height is 10d and the nozzle spacing is 5d (d is the diameter of the jet nozzle), the material removal rate of the three nozzle model is 2.16 times that of the single nozzle model. The removal rate of the material of the seven nozzle model is the single nozzle model material 4.25 times the removal rate.