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以自激振荡式脉冲水射流喷嘴为研究对象,应用FLUENT软件分别对具有锥形、三次曲线和双圆弧内轮廓的上喷嘴进行了仿真研究,分析了上喷嘴流道内轮廓形状对脉冲射流特性的影响规律。仿真结果表明,自激脉冲喷嘴上喷嘴的流道内轮廓形状对脉冲射流有很大的影响,当压力较低时,上喷嘴为锥形流道的脉冲喷嘴特性比三次曲线和双圆弧流道好;当压力较高时,上喷嘴为三次曲线流道的脉冲喷嘴特性比双圆弧和锥形好。研究结果还表明,脉冲射流的出口速度与泵压成正比。
Taking the self-excited pulsed water jet nozzle as the research object, the upper nozzle with conical, cubic curve and double circular arc internal contour was simulated by using FLUENT software. The influence of the shape of the upper nozzle on the jet characteristics The law of influence. The simulation results show that the shape of the flow channel in the nozzle of the self-excited pulsed nozzle has a great influence on the pulse jet. When the pressure is low, the characteristics of the pulsed nozzle with the conical flow channel at the upper nozzle are better than those of the cubic curve and the double arc flow channel Good; when the pressure is high, the characteristics of the pulsed nozzle with the upper nozzle being cubic curve are better than the double arc and the tapered shape. The results also show that the exit velocity of the pulsed jet is proportional to the pump pressure.