Magnetogasdynamic Flow Control of a Mach Reflection

Two-dimensional regular and Mach reflections have been studied in the Mach 4.96 dual-solution domain for a 25° and 26° double-fin inlet. The steady-state computational Mach and regular reflections were subjected to magnetogasdynamic forces to determine whether these forces could be used as a possible flow control mechanism. The numerical code employed for this research solved the inviscid Euler equations with added source terms for the ponderomotive force and accompanying energy interactions. The 25° regular reflection was determined to be extremely sensitive to a decelerating Lorentz force. Transient application of the force led to the transition of the regular reflection to a Mach reflection, increasing the total pressure losses and decreasing the compression ratio. Sustained application of the force resulted in inlet unstart. An accelerating Lorentz force was also examined with the goal of transitioning the 26° Mach reflection to a more efficient regular reflection. The location of the accelerating force and the parameters governing its magnitude were examined. Such forces push the Mach reflection back to a more stable location and reduce the Mach stem height. For the interaction parameters considered, fully regular reflections were not obtained. However, the accelerating Lorentz force proved capable of increasing the total pressure recovery and the static pressure compression beyond the regular reflection values.Air Force Inst of Tech Wright-Patterson AFB OH Dept of Aeronautics and Astronautics is the author of 'Magnetogasdynamic Flow Control of a Mach Reflection', published 2004 under ISBN 9781423517214 and ISBN 1423517210.