张阳,李杰
ZHANG Yang,LI Jie

• 1:北京工商大学人工智能学院

摘要(Abstract)：

为探究可调式文丘里管内部流场的空化特性，采用k-ε湍流模型和Zwart空化模型，利用FLUENT软件模拟不同参数条件下对空泡分布、流场压力、流速等空化特性的影响规律，并结合高速摄影系统进行试验验证。研究表明：在一定范围内增大流场的入口压力，可以提高空化效果，但会受到结构参数的限制；出口压力主要作用于下游流场，影响空泡发展，出口压力越大，空化程度越弱；增大空化器的喉部直径，流体的扰动强度和变化梯度下降，空泡数量减少。试验与仿真结果表明，当入口压力为0.9 MPa、出口压力为大气压、喉部直径为1.5 mm时，该装置产生空化现象的效率最高。
In order to explore cavitation characteristics of internal flow field in adjustable Venturi tube，based on the k-ε turbulence model and Zwart cavitation model，FLUENT flow field calculation software was used to simulate the influences of different parameters on cavitation characteristics such as cavitation distribution，flow field pressure and velocity.Experimental verification was carried out in combination with high speed camera system.The results show that the cavitation effect can be improved by increasing the inlet pressure in a certain range，but it will be limited by the structural parameters.The outlet pressure mainly acts on the downstream flow field and affects the development of cavitation.The increase of outlet pressure results in the decrease of cavitation degree.With the increase of the throat diameter of the cavitator，the disturbance intensity and change gradient of the fluid decrease，and the number of cavitation decreases.The results show that when the inlet pressure is 0.9 MPa，the outlet pressure is atmospheric pressure，and the throat diameter is 1.5 mm，and the device has the highest efficiency in generating cavitation.

关键词(KeyWords)： 水力空化;文丘里管;可调;流场特性
hydraulic cavitation;Venturi tube;adjustable;flow field characteristics

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(51975006);; 北京市委组织部优秀人才项目(2016000020124G026)

作者(Author): 张阳,李杰
ZHANG Yang,LI Jie

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