Experimental investigation on upstream-injection interaction with a scramjet cavity flameholder

The study has evaluated the coherent structures and the velocity field of gaseous transverse jet upstream of a scramjet flameholder in a supersonic turbulent flow. The high spatiotemporal resolution coherent structures of the jet plume/wakes and the cavity shear layer were obtained by utilizing the...

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Bibliographic Details
Published in:Chinese science bulletin 2014-05, Vol.59 (14), p.1568-1574
Main Authors: Sun, Ming-Bo, Zhang, Shun-Ping, Zhao, Yan-Hui, Zhao, Yu-Xin, Liang, Jian-Han
Format: Article
Language:English
Subjects:
Chemistry/Food Science
Earth Sciences
Engineering
Fluid dynamics
Holes
Humanities and Social Sciences
Lasers
Life Sciences
multidisciplinary
Physics
Science
Science (multidisciplinary)
Scramjets
Shear layers
Turbulence
Upstream
Wakes
上游
实验
横向喷流
激光散射技术
火焰稳定器
相互作用强度
相干结构
超燃冲压发动机
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Summary:The study has evaluated the coherent structures and the velocity field of gaseous transverse jet upstream of a scramjet flameholder in a supersonic turbulent flow. The high spatiotemporal resolution coherent structures of the jet plume/wakes and the cavity shear layer were obtained by utilizing the nanoparticle-based planar laser scattering technique. Compared to the no upstream injection case, the cavity shear layer downstream of the jet shows significant mass exchange with mainstream. The particle image veloc- imetry velocity field and the velocity profiles demonstrated that the interaction intensity of the cavity shear layer with the upstream injection is further enhanced as the injection stagnation pressure increases.
ISSN:1001-6538
1861-9541
DOI:10.1007/s11434-014-0148-2