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Published 1983 | Published
Report Open

Linear Theory of Pressure Oscillations in liquid-Fueled Ramjet Engines

Abstract

Pressure oscillations in ramjet engines are studied. within quasi one-dimensional linear acoustics. The flow field in the dump combustor is approximated by division into three parts: a flow of reactants, a region containing combustion products, and a recirculation zone, separated by a flame sheet and a dividing streamline. The three zones are matched by considering kinematic and conservation relations. Acoustic fields in the inlet section and in the combustion chamber are coupled to provide an analytical equation for the complex wave number characterizing the linear stability. The calculated results are compared with the experimental data reported by the Naval Weapons Center. Reasonable agreements are obtained.

Additional Information

© 1983, American Institute of Aeronautics and Astronautics. This work was, supported by the California Institute of Technology and by the Air Force Office of Scientific Research, Grant No. AFOSR-80-0265.

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Created:
August 19, 2023
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