| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
We investigated the responsiveness of cavitation generated in a turbopump inducer for rocket engines to pressure fluctuations and flow rate fluctuations. It was found that it responds to pressure fluctuations with almost no delay. In addition, it was clarified that it responds to the flow rate fluctuation with a phase delay of about 90 degrees. Furthermore, the index showing the instability of the flow field, which was derived based on the results of the two-dimensional flow analysis, showed higher instability when a casing in which unstable flow phenomena due to cavitation occurred was used. From this result, it was found that this index could qualitatively show the stability of cavitation even in the three-dimensional flow.
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