H2 injection in Mach 5 air flow: numerical study
A numerical study of the hydrogen injection has been investigated in a flow configuration obtained from the interaction of two axisymmetric oblique shock waves produced by a conical ring and a centre-body. This configuration was named a Viscous Mach Interaction (V.M.I) due to a strong shock/boundary layer interaction. The geometry which leads to this configuration is used as hypersonic inlet and as this inlet could be axisymmetric or two-dimensional, a first result was to show that this V.M.I configuration exists in both cases. Different injection locations are tested in order to keep this V.M.I configuration. The influence of the hydrogen injection on the mixing flow behavior is analyzed. The numerical results show that the equivalence ratio Φ of the gas-mixture is high enough in order to have a non-reactive gas close to the wall which keeps the hydrogen temperature along the centre-body. Thus the hydrogen injection can play the role of a forward-facing jet reducing heat-transfer at the centre-body wall.
KeywordsIncident Shock Oblique Shock Wave Conical Ring Shock Wave Interaction Hydrogen Injection
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