Experimental study on cavitating flow characteristics of inducer with inflow entrained non⁃condensable gas

被引：0
作者：
Lin, Ronghao [1 ]
Chen, Hui [1 ]
Xiang, Le [1 ]
Qu, Nianchong [1 ]
机构：
[1] Xi’an Aerospace Institute, Xi’an
来源：
Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica | 2024年 / 45卷 / 11期
关键词：
cavitation; cavitation instability; inducer; non-condensable gas; visualization;
D O I：
10.7527/S1000-6893.2023.29095
中图分类号：
学科分类号：
摘要：
To study the effect of inflow entrained non-condensable gas on cavitating flow inside the inducer，a series of experiments are performed based on the visualization experimental platform. The macroscopic performance，cavitation development and cavitation instabilities of the inducer pump with different inlet gas volume fractions are investigated. It is found that the head breakdown occurred earlier at larger inlet gas volume fractions. Additionally，the non-condensable gas is entrained in leakage flow vortices and backflow vortices，resulting in significant extensions of leakage flow vortex cavities and backflow vortex cavities，under larger inlet non-condensable gas entrained condition. With small cavitation numbers（Φ=0. 083，σ=0. 090，and Φ=0. 071，σ=0. 068），the non-condensable gas provides extra cavitation compliance to the cavity and therefore suppresses the cavitation surge. © 2024 Chinese Society of Astronautics. All rights reserved.
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