人工淹没空化喷嘴的性能研究

Performance Study of Artificially Flooded Cavitation Nozzles

利用FLUENT软件对角形喷嘴在淹没环境下的流场进行数值模拟,以含气率和气相体积作为判断喷嘴产生空化效果的依据,通过分析入口压力、扩张角大小、喉管直径设计了最优角形喷嘴结构,并在角形喷嘴基础上设计了一种人工淹没空化喷嘴。研究表明,高压水射流在人工营造的淹没环境下,射流边界产生显著的空化效应,并能维持到大气环境中。

The numerical simulation of the flow field of the angular nozzle in the submerged environment was carried out by using FLUENT software. Taking the gas content and gas volume as the basis for judging the cavitation effect of the nozzle, the optimal angular nozzle structure was designed by analyzing the inlet pressure, the size of the expansion angle and the diameter of the throat. And an artificial submerged cavitation nozzle is designed on the basis of the angle nozzle. The research shows that under the artificially created submerged environment of high-pressure water jet, the jet boundary produces significant cavitation effect and can be maintained in the atmospheric environment.