2016 Fiscal Year Final Research Report
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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| Project Period (FY) |
2014-04-01 – 2017-03-31
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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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| Free Research Field |
高温気体力学
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