Fifteen rocket sled tests were performed in an attempt to measure extreme overpressure magnifications in the sonic boom caustic created by accelerating supersonic vehicles. These sleds with 25-HVAR-rocket motors were accelerated to about 425 m/s, Mach 1.25, on a 1500-m track. It was finally established that sonic-boom bow waves from these events were not strongly focused by propagation to 600 to 900 m from the track. It appears that nonlinear acoustic aperture effects prevented sharp focusing. Only 15 to 30% overpressure magnifications were recorded by an array of pressure gages. 32 figures, 15 tables. (ERA citation 04:047853)
Attempt to Measure Sonic Boom Caustics from Supersonic HVAR Rocket Sleds
1979
43 pages
Report
No indication
English
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