In this paper, the cavitating flow performance of a cavitation Venturi tube was studied to obtain the steady flow curve and predict the cavitation region based on the realizable k-ε turbulence model and Zwart（Zwart-Gerber-Belamri）cavitation model under the designated conditions. Venturi tubes with different throat diameters of 12mm, 10mm and 8mm were selected respectively, and the distance between the throat and the entrance pipe, L, was designed as 10mm, 7.5mm and 5mm respectively. Compared with the corresponding experimental data, the development rules of steady cavitation were analyzed and the optimal parameters were selected. The results indicate that (1) hydraulic cavitation is the main reason for the steady flow of Venturi tubes, (2) throat diameter affects the steady flow performance of cavitation; the maximum flow rate is 3.052L/s with the throat diameter of 12mm,and the minimum flow is 1.358L/s with the throat diameter of 8mm, (3) the distance between the throat and entrance mainly affects the inception of hydraulic cavitation; the maximum pressure ratio is 0.86 with L of 5mm, and the minimum pressure ratio is 0.849 with L of 10mm.

中文翻译：

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空化文丘里管流动控制性能的数值研究

本文研究了空化文丘里管的空化流动性能，以在指定条件下基于可实现的k-ε湍流模型和Zwart（Zwart-Gerber-Belamri）空化模型来获得稳定的流动曲线并预测空化区域。 。分别选择喉管直径分别为12mm，10mm和8mm的文丘里管，喉管与入口管之间的距离L分别设计为10mm，7.5mm和5mm。与相应的实验数据相比较，分析了稳定空化的发展规律并选择了最佳参数。结果表明：（1）水力空化是文丘里管稳定流动的主要原因，（2）喉管直径影响空化的稳定流动性能；最大流量为3。喉部直径为12mm时为052L / s，喉部直径为8mm时最小流量为1.358L / s。（3）喉部与入口之间的距离主要影响水力空化的开始；L值为5mm时，最大压力比为0.86，L值为10mm时，最小压力比为0.849。