Brian E. Earp

Date of Award

3-2004

Document Type

Thesis

Degree Name

Master of Science in Aeronautical Engineering

Department

Department of Aeronautics and Astronautics

First Advisor

Richard J. McMullan, PhD

Abstract

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.

AFIT Designator

AFIT-GAE-ENY-04-M07

DTIC Accession Number

ADA424159

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