Numerical simulation of flow characteristics for a labyrinth passage in a pressure valve

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• 作者：Hai-min WANG (王海民)^a ; ^b ; ^{hmwang@usst.edu.cn" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Yue ZHAO (赵越)^a ; Jian-xing WANG (汪建兴)^a ; Xiang-shuai KONG (孔祥帅)^a ; Huan LIU (刘欢)^a ; Ke-liang LI (李科良)^a ; Xi-fang WANG (王喜芳)^a
• 关键词：tortuous labyrinth passage ; right angle turns ; multistage pressure drop ; pressure recover
• 刊名：Journal of Hydrodynamics, Ser. B
• 出版年：2016
• 出版时间：August 2016
• 年：2016
• 卷：28
• 期：4
• 页码：629-636
• 全文大小：2394 K

文摘

A tortuous labyrinth passage consists of a series of right angle turns in a disk of high pressure control valve. In this paper, numerical simulations are made for the velocity and pressure distributions in this passage. It is shown that the “series passage” can induce a pressure dropping more effectively. The main function of the “series passage” is to induce a pressure dropping while the “parallel passage” is mainly to regulate the flow-rate. As a cross sectional area process, a series of reduction and expansion, the pressure will also see dropping and partial recovery, which is called the multistage pressure drop. By this way, the velocity can be controlled in a reasonable level anywhere in this tortuous labyrinth passage. With the fluid pressure dropping in a downwards serrated way, the pressure is higher than the local saturate vapor pressure, therefore, no cavitation is induced by the phase transition.