| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2013: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2011: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Research Abstract |
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.
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