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Title of Journal: Chin Sci Bull

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Abbravation: Chinese Science Bulletin

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SP Science China Press

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DOI

10.1007/bf02478729

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1861-9541

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Parametric effects on the combustion flow field of

Authors: Wei Huang ZhenGuo Wang ShiBin Luo Jun Liu
Publish Date: 2011/12/03
Volume: 56, Issue: 35, Pages: 3871-3877
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Abstract

The flameholding mechanism in hypersonic propulsion technology is the most important factor in prolonging the duration time of hypersonic vehicles The twodimensional coupled implicit Reynoldsaveraged NavierStokes equations the shearstress transport kω turbulence model and the finiterate/eddydissipation reaction models were used to simulate the combustion flow field of a typical strutbased scramjet combustor We investigated the effects of the hydrogenair reaction mechanism and fuel injection temperature and pressure on the parametric distributions in the combustor The numerical results show qualitative agreement with the experimental data The hydrogenair reaction mechanism makes only a slight difference in parametric distributions along the walls of the combustor and the expansion waves and shock waves exist in the combustor simultaneously Furthermore the expansion wave is formed ahead of the shock wave A transition occurs from the shock wave to the normal shock wave when the injection pressure or temperature increases and the reaction zone becomes broader When the injection pressure and temperature both increase the waves are pushed out of the combustor with subsonic flows When the waves are generated ahead of the strut the separation zone is formed in double near the walls of the combustor because of the interaction of the shock wave and the boundary layer The separation zone becomes smaller and disappears with the disappearance of the shock wave Because of the horizontal fuel injection the vorticity is generated near the base face of the strut and this region is the main origin for turbulent combustionThis article is published under an open access license Please check the Copyright Information section for details of this license and what reuse is permitted If your intended use exceeds what is permitted by the license or if you are unable to locate the licence and reuse information please contact the Rights and Permissions team

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