来流含不凝性气体的诱导轮空化流动实验研究
收稿日期: 2023-06-01
修回日期: 2023-07-24
录用日期: 2023-08-23
网络出版日期: 2023-09-13
基金资助
国家重大基础研究项目(613321)
Experimental study on cavitating flow characteristics of inducer with inflow entrained non⁃condensable gas
Received date: 2023-06-01
Revised date: 2023-07-24
Accepted date: 2023-08-23
Online published: 2023-09-13
Supported by
National Basic Research Program of China(613321)
林荣浩 , 陈晖 , 项乐 , 屈念冲 . 来流含不凝性气体的诱导轮空化流动实验研究[J]. 航空学报, 2024 , 45(11) : 529095 -529095 . DOI: 10.7527/S1000-6893.2023.29095
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.
Key words： inducer; cavitation; visualization; non-condensable gas; cavitation instability
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