Numerical simulation and analysis of the solution are presented for a laminar reacting flowfield of air and hydrogen in the case of external combustion employed to reduce base drag in hypersonic vehicles operating at transonic speeds. The flowfield consists of a transonic air stream at a Mach number of 1.26 and a sonic transverse hydrogen injection along a row of 26 orifices. Self-sustained combustion is computed over an expansion ramp downstream of the injection and a flameholder, using the recently developed RPLUS code. Measured data is available only for surface pressure distributions and is used for validation of the code in practical 3D reacting flowfields. Pressure comparison shows generally good agreements, and the main effects of combustion are also qualitatively consistent with experiment.
Computation of H2/Air Reacting Flowfields in Drag-Reduction External Combustion
1992
18 pages
Report
No indication
English
Fuels , Spacecraft Trajectories & Flight Mechanics , Aerodynamic drag , Base flow , Combustion physics , Drag reduction , Flow distribution , Hydrogen fuels , Hypersonic vehicles , Supersonic combustion , Transonic speed , Aerospace planes , Air flow , Flame holders , Injection , Mach number , Pressure distribution