Accession Number : AD0267503

Title :   A STUDY OF SHOCK WAVES MOVING OVER A TRANSVERSELY SLOTTED WALL

Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH

Personal Author(s) : MAUTERER, OSCAR

Report Date : AUG 1961

Pagination or Media Count : 81

Abstract : The effect on a shock wave was investigated as it passed a pair of transversely slotted test plates in the top and bottom walls of a rectangular shock tube. Interest was on the shock strength, defined as the pressure ratio across the shock for this study. The shock wave response to the disturbance was verified by Schlieren photography. The slot width, slot entrance radius, effective slot depth, and strength of the incident shock wave were varied to determine the effects of these parameters. The attenuation was found from pressure measuring transducer data which was recorded photographically. The time to establish the quasi-steady flow of air out through the openings determined the extent of attenuation. When the slot width or slot entrance radius were large, the reflected shock waves generated at the disturbance were sufficiently strong to delay the mass flow out of the opening; thus, the attenuation was reduced. The attenuation increased as the effective slot depth was decreased. Schlieren photography verified the formation of the reflected shock waves and the formation of the rarefaction waves associated with the loss of mass behind the shock wave. (Author)

Descriptors :   *SHOCK WAVES, *SUCTION SLOTS, ATTENUATION, EXPERIMENTAL DATA, MANOMETERS, MEASUREMENT, OSCILLOSCOPES, PHOTOGRAPHIC ANALYSIS, PRESSURE, SCHLIEREN PHOTOGRAPHY, SHOCK TUBES, TRANSDUCERS, TUNGSTEN ALLOYS.

Distribution Statement : APPROVED FOR PUBLIC RELEASE