| Budget Amount *help |
¥18,070,000 (Direct Cost: ¥13,900,000、Indirect Cost: ¥4,170,000)
Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2016: ¥14,170,000 (Direct Cost: ¥10,900,000、Indirect Cost: ¥3,270,000)
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| Outline of Final Research Achievements |
In order to clarify a mechanism of appearance of thermodynamic effect, in-situ measurement of dissolved gas and the control were done. From the measurement of dissolved oxygen, it was shown that liberation of dissolved gas is promoted when the unsteadiness of cavitation is strong in flow fields even with the same cavity area. This means that the localized flow acceleration and pressure fluctuations of the unsteady cavitation flow itself contributes to the liberation of dissolved gas. By adding degassed system was added which is synchronized with the in-situ measurement, dissolved oxygen ratio was kept constant though the mainstream temperature increases. Then scale effect was excluded and the thermodynamic effect was extracted.
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