Experimental demonstration of unsteady detatched shock wave and theory development toward its active control
| Project/Area Number |
26420099
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Fluid engineering
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| Research Institution | Tohoku University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
大谷 清伸 東北大学, 流体科学研究所, 助教 (80536748)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 衝撃波 / 流体不安定性 / 低比熱比気体 / 弾道飛行装置 / 数値流体力学 |
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| Outline of Final Research Achievements |
An instability of a detached shock wave formed in front of a blunt body was investigated by numerical simulations and experiments using a ballistic range toward an engineering application of unsteady shock waves. The experiments successfully demonstrated that the detached shock wave is unstable under low-specific-heat-ratio and high-Mach-number conditions, and the numerical simulations were able to predict the critical condition of the instability. Moreover, the front shape of the projectile equipped with an edge is preferable to destabilize the detached shock wave, and acoustic waves emitted from the edge play a significant role on inducing the instability.
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Report
(4 results)
Research Products
(6 results)
