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Position: Home > Articles > Numerical Simulation and Visualization Study of Cavitating Flow in Hydraulic Ball Valve Transactions of the Chinese Society for Agricultural Machinery 2003,34 (3) 45-48

球阀阀口气穴流场的模拟与可视化研究

作  者：
高红;傅新;杨华勇;築地徹浩
单  位：
上智大学理工学院;浙江大学流体传动及控制国家重点实验室
关键词：
流体传动与控制;球阀;气穴流场仿真;流动显示;噪声测试
摘  要：
将 RNG k- ε湍流模型与多相流技术相结合 ,应用于球阀阀口的气穴流场的数值模拟。计算了二维轴对称气穴流场的速度、压力及气体体积比分布。运用卤素灯与高速摄像机组成的流场可视化试验系统观察了球阀阀口附近的气穴现象 ,获得了气穴流场的分布信息 ,与仿真结果比较 ,吻合良好 ,表明 RNG k- ε湍流模型能有效地描述球阀等液压元件的阀口气穴流动。同时对球阀有无气穴现象分别进行了噪声测试和频谱分析 ,试验结果表明 ,气穴现象使球阀噪声级增加。
译  名：
Numerical Simulation and Visualization Study of Cavitating Flow in Hydraulic Ball Valve
作  者：
Gao Hong Fu Xin Yang Huayong(Zhejiang University) Tetsuhiro Tsukiji(Sophia University)
关键词：
Fluid power transmission and control, Ball valve, Cavitating flow field simulation, Flow visualization, Noise measurement
摘  要：
The two dimensional cavitating flow issuing from the orifice of a ball valve was numerically investigated using the combined technologies of the RNG k ε turbulence model and the multiphase flow model. The velocity vector distribution, pressure distribution and contours of volume fraction of air were predicted for an axisymmetric case. Flow visualization experiment was conducted to capture cavitation images near the orifice of the ball valve using a metal halide lamp and a high speed video camera. The predicted high volume fraction region shows a good agreement with the observed cavitation region. Therefore, the RNG k ε turbulence model could achieve a reasonable prediction for the cavitating flow within the ball valve as well as other hydraulic components. Furthermore, the noise spectrums of the ball valve in cavitation and non cavitation cases were measured. The results show that the cavitation phenomenon around the orifice makes the noise level of the ball valve increased.

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