| Project/Area Number |
14350505
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Aerospace engineering
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| Research Institution | TOHOKU UNIVERSITY |
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Principal Investigator |
NIIOKA Takashi TOHOKU UNIVERSITY, Inst. Fluid Sci., Professor, 流体科学研究所, 教授 (90208108)
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| Co-Investigator(Kenkyū-buntansha) |
HANAI Hironao TOHOKU UNIVERSITY, Inst. Fluid Sci., Research Associate, 流体科学研究所, 助手 (30312664)
KOBAYASHI Hideai TOHOKU UNIVERSITY, Inst. Fluid Sci., Professor, 流体科学研究所, 教授 (30170343)
MASUYA Goro TOHOKU UNIVERSITY, Graduate School of Engineering, 大学院・工学研究科, 教授 (20271869)
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| Project Period (FY) |
2002 – 2003
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| Project Status |
Completed (Fiscal Year 2003)
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| Budget Amount *help |
¥14,300,000 (Direct Cost: ¥14,300,000)
Fiscal Year 2003: ¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 2002: ¥11,900,000 (Direct Cost: ¥11,900,000)
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| Keywords | Shock Wave / Supersonic Combustion / Scramiet / Hydrogen Injection |
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| Research Abstract |
To clarify the phenomena of the interaction between shock wave and combustion in scramjet engine combustors at low Mach numbers, the fundermental research was performed experimentally and numerically flame-holding characteristics of hydrogen injected vertically to the wall surface. The following results ware obtaind :
1.When the shock wave was introduced in the upstream of injection slit, the position of the detached shock wave moved to the upstream. As a result, we could hold the flame even at low total temperatures and injection pressures.
2.The LU-SGS method was improved to be made in parallel imaginarily by a discrete region method.
3.Numerical results were qualitatively consistent with experimental ones. Since the most hydrogen stayed in the downstream detached region and reacted there, the incident shock wave introduced in the downstream detached region was more effective compared with the case introduced in the upstream of the injection slit, when the equivalence retio was small and the hydrogen temperature was low. The flame-holding in the latter case, however, could not be analyzed completely because of complex turbulent diffusion.
4.By changing from the two-dimensional fuel slit jet to a single circular slot jet, fuel injection pressure could be raised without thermal choke. Also, a new measurement method of supersonic flows was developed by linking PTV with CFD.
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