A computational fluid dynamic study was performed to analyze the efficacy of a novel acoustic suppression device for high Mach number cavity flow. A clean cavity computational model was first qualitatively validated based upon recorded data and shown to agree well with experimental results for overall sound pressure levels. The proposed configuration, consisting of a rod in crossflow over the leading edge of the cavity with a forty-five degree rod fence placed upstream of the cavity, was then inserted into the model to test for a quantitative reduction in sound pressure level. A reduction of approximately 8 decibels was observed with the proposed configuration. A parametric study of each component of the configuration was also tested in an attempt to isolate the reduction mechanism.
展开▼
