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

作　　者：王海民 赵越 汪建兴 孔祥帅 刘欢 李科良 王喜芳 

机构地区：[1]School of Energy and Power Engineering,University of Shanghai for Science and Technology [2]Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering,University of Shanghai for Science and Technology

出　　处：《Journal of Hydrodynamics》2016年第4期629-636,共8页水动力学研究与进展B辑（英文版）

基　　金：supported by the National Natural Science Foun-dation of China(Grant Nos.51176127,51106099);the Shanghai Science and Technology Commission(Grant No.13DZ2260900)

摘　　要：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.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.

关 键 词：passage valve dropping multistage turns sectional anywhere regulate vortex inlet 

分 类 号：O35[理学—流体力学]