An analysis has been performed of the flow oscillations observed in the 'empty' nozzles of the space shuttle solid rocket motor (SRM's) after they have been jettisoned at burnout. The unsteady flow phenomenon is similar in many respects to the flow oscillations observed on bodies with flow separation spikes. Hence, a previously developed analytic method for prediction of the spiked body oscillation frequency has been extended to apply to forward facing cavities. The predicted frequencies are in good agreement with experimental results. Furthermore, a simple time history analysis produces time average loads on the forward facing SRM-nozzles that agree well with the observed discontinuous load changes caused by the flow oscillation. The analytic methods have direct or indirect application to analysis of inlet dynamics, supersonic control buzz, and nosetip aerodynamics of ablating re-entry vehicles. (Kursetz)
Unsteady flow phenomena in forward facing cavities
Merkmale der ungleichmaessigen Stroemung in nach vorn offenen Hohlraeumen
AIAA-Papers ; 1-14
1978
14 Seiten, 17 Bilder, 93 Quellen
Conference paper
English
Asymmetric Unsteady Flow in Forward-Facing Cavities
AIAA | 1978
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