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为了得到较高的抽吸性能,液体火箭发动机涡轮泵采用了气蚀诱导轮,这是一种轴流式叶轮。诱导轮工作时,一般都出现一些气蚀,因而出现了各种问题。气蚀诱导轮的不稳定性同液体火箭的POGO现象的关系是十分密切的。本文介绍了在水洞试验中气蚀诱导轮不稳定性的一些实验结果。试验的诱导轮有三个螺旋形叶片,它不仅出现转动气蚀,而且还诱发出低频振荡的汽蚀。使用高速影片和诱导轮上游及下游的动态压力研究了这二种气蚀现象的差别。
In order to get a higher suction performance, the liquid rocket engine turbo pump uses a cavitation inducer, which is an axial impeller. Induction wheel work, there are generally some cavitation, resulting in a variety of problems. The relationship between the instability of the cavitation inducer and the POGO phenomenon of liquid rockets is very close. This paper presents some experimental results of instability of cavitation inducer in water tunnel test. The test induction wheel had three helical blades that not only caused cavitation cavitation, but also induced cavitation with low-frequency oscillations. The difference between these two cavitation phenomena has been studied using high-speed video and inducing dynamic pressure upstream and downstream of the wheel.