The present study is part of a continuing investigation of unsteady, transonic diffuser flows, with application to dynamic distortion in the inlets of fighter aircraft and airbreathing missile propulsion systems. The investigation is focused on a simple, two-dimensional diffuser configuration displaying a weak shock shortly downstream of the throat. Flows in this model were found to display self-excited oscillations involving the shock and the entire subsonic flow behind it. The shock displacement amplitudes are comparable to the throat height and occur at frequencies characterized by the flow speed and the length of the divergent diffuser section. The time- mean and fluctuating properties of this flow and the dependence of these properties on shock strength have been documented. (Peters)
Unsteady transonic diffuser flows in a two-dimensional diffuser
Instationaere, transsonische Diffusorstroemungen in einem zweidimensionalen Diffusor
US Government Reports ; Mai ; 1-30
1978
30 Seiten
Report
Englisch
Unsteady transonic flow in a two-dimensional diffuser
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