Accession Number : ADP009063

Title :   Experimental Measurements of the Blast Pressure Profile for 20mm Perforated Muzzle Brake Designs.

Corporate Author : ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s) : Savick, Douglas S.

Report Date : SEP 1993

Pagination or Media Count : 16

Abstract : Pressure measurements were recorded at the Weapons Technology Directorate (WTD) of the Army Research Laboratory to verify predictions of a blast model used at Benet Weapons Laboratory (BWL). An array of eleven piezoelectric gages was placed in a vertical line perpendicular to the gun barrel and positioned at various locations behind the muzzle during the testing of two perforated muzzle brakes. The two muzzle brakes were designed and fabricated to fit on to a 20mm Mann barrel. The two brakes were compared to a third device with no perforations that served as a baseline. The first muzzle brake was a scaled down version of the EX35 and the second was a special design that had two rows of holes relocated between 7.5 and 9 calibers behind the muzzle (split brake). The pressure gage array was used to measure the portion of the blast profile that affected the area behind the gun. This test was performed in conjunction with the first phase of the test where far field pressure measurements and blast wave shadowgraphs were obtained. This paper will present the characteristics of the blast pressure wave as it travels back along the gun axis correlating the pressure profile data with the shadowgraphs that were taken at the same locations. Results from the present blast profile test provided quantitative information for precise comparisons.

Descriptors :   *BLAST WAVES, *GUN BARRELS, *MUZZLE BRAKES, ARMY RESEARCH, ARRAYS, BLAST, FAR FIELD, GAGES, MEASUREMENT, MODELS, PERFORATION, PIEZOELECTRIC GAGES, PRESSURE, PRESSURE GAGES, PROFILES, TEST AND EVALUATION, MATHEMATICAL PREDICTION.

Subject Categories : Guns
      Ballistics

Distribution Statement : APPROVED FOR PUBLIC RELEASE