Weapon Bay Cavity Noise Environments, Data Correlation and Prediction for the B-1 Aircraft.
Final rept. Feb 79-May 80,
ROCKWELL INTERNATIONAL EL SEGUNDO CA NORTH AMERICAN AIRCRAFT DIV
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During development of the B-1 aircraft, an extensive cavity noise measurement and noise reduction program using wind tunnel models and evaluation on a flight-test aircraft was conducted. Substantial cavity noise reduction was achieved with retrofitted spoilers for a mach 0.6 to 1 range for the weapon bay cavity of LD 2.2. A substantial amount of cavity unsuppressed and suppressed data were acquired from wind tunnel models and the full-scale aircraft. Data for weapon bay cavities with internal stores and multiple open cavities was also obtained. The data acquired during development of B-1 cavity noise suppressors are correlated and compared with previously published data. The data are correlated with existing prediction techniques and modifications to the current prediction techniques, and guidelines are recommended. Author