PIV analysis and high-speed photographic observation of cavitating flow field behind circular multi-orifice plates

作     者：Zhi-ping Guo Xi-huan Sun Zhi-yong Dong Zhi-ping Guo;Xi-huan Sun;Zhi-yong Dong

作者机构：College of Hydro-Science and EngineeringTaiyuan University of TechnologyTaiyuan 030024China Department of Transportation EngineeringShanxi Conservancy Technical InstituteYuncheng 044004China College of Civil Engineering and ArchitectureZhejiang University of TechnologyHangzhou 310014China 

出 版 物：《Water Science and Engineering》 (水科学与水工程（英文版）)

年 卷 期：2020年第13卷第2期

页      面：145-153页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 0707[理学-海洋科学] 08[工学] 09[农学] 0815[工学-水利工程] 0903[农学-农业资源与环境] 0813[工学-建筑学] 0824[工学-船舶与海洋工程] 0814[工学-土木工程] 0713[理学-生态学] 

基　　金：supported by the National Natural Science Foundation of China(Grant No.51479177) 

主　　题：Cavitating flow Circular multi-orifice plate PIV technique High-speed photography Turbulence characteristics 

摘      要：Based on a self-developed hydrodynamic cavitation device with different geometric parameters for circular multi-orifice plates,turbulence characteristics of cavitating flow behind multi-orifice plates,including the effects of orifice number and orifice layout on longitudinal velocity,turbulence intensity,and Reynolds stress,were measured with the particle image velocimetry(PIV)*** regimes of the cavitating flow were also observed with high-speed *** experimental results showed the following:(1)high-velocity multiple cavitating jets occurred behind the multi-orifice plates,and the cavitating flow fields were characterized by topological structures;(2)the longitudinal velocity at each cross-section exhibited a sawtooth-like distribution close to the multi-orifice plate,and each sawtooth indicated one jet issuing from one orifice;(3)there were similar magnitudes and forms for the longitudinal and vertical turbulence intensities at the same cross-section;(4)the variation in amplitude of Reynolds stress increased with an increase in orifice number;and(5)the cavitation clouds in the flow fields became denser with the increase in orifice number,and the clouds generated by the staggered layout of orifices were greater in number than those generated by the checkerboard-type one for the same orifice *** experimental results can be used to analyze the mechanism of killing pathogenic microorganisms through hydrodynamic cavitation.