Suppression of Cavitation Instabilities in an Inducer by a Backflow Recirculator

在火箭发动机的涡轮泵诱导器中，会发生空化不稳定并引起轴振动。我们研究了抑制空化不稳定性的各种类型的套管处理方法。采用带肋片的周向凹槽作为旋流破碎器的机壳处理方法，可以有效地抑制空化不稳定性。测量并阐明了与空化不稳定性发生有关的空化动力学特性。

In turbopump inducers for rocket engines, cavitation instabilities occur and cause shaft vibrations. We examined various types of casing treatments for suppressing the cavitation instabilities. The casing treatment which consisted of a circumferential groove with some ribs as a swirl breaker could suppress the cavitation instabilities effectively. The dynamic characteristics of cavitation, which relate to the occurrence of cavitation instabilities, were measured and clarified.