Characteristics of cavitation and pressure fluctuation of a two-dimensional valve based on FLUENT simulation

被引：0
|
作者：
Zhao Y. [1 ,2 ]
Ruan J. [1 ]
Ding C. [1 ]
Gao F. [2 ]
机构：
[1] College of Mechanical Engineering, Zhejiang University of Technology, Hangzhou
[2] Intelligent Manufacturing College, Jiaxing
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2022年 / 41卷 / 18期
关键词：
cavitation characteristics; numerical simulation; pressure pulsation; two-dimensional valve;
D O I：
10.13465/j.cnki.jvs.2022.18.029
中图分类号：
学科分类号：
摘要：
The pilot stage and power stage of a two-dimensional valve are integrated into one spool，which makes easy to realize the fast operation and high frequency response of the valve. Such kind of valve has the advantages of simple structure, stable performance and high power to weight ratio. The cavitation caused by the pilot orifice is an important cause of pressure pulsation，vibration and noise. Through numerical calculation，the cavitation characteristics and pressure pulsation of the flow field in an opening and closing period of the valve port were analyzed. It can be seen that in the flow field of the pilot stage of the two-dimensional valve，the chute area of the valve sleeve at the downstream of the throttle port is the main area where cavitation occurs. The maximum speed at the throttle port on the closed side (108 m/s) is higher than that on the open side (97. 8 m/s)，and the high speed duration is 0. 2 s longer. The cavitation degree in valve opening is serious，and due to that，the cavitation area in valve closing is large. The cavitation of the flow field in the pilot stage of the two - dimensional valve will cause pressure pulsation. The pressure pulsation near the wall is concentrated at the frequency within 50 Hz, and the pressure pulsation in the chute of the valve sleeve shows broadband characteristics. © 2022 Chinese Vibration Engineering Society. All rights reserved.
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页码：228 / 235
页数：7
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