Accession Number : AD0864288

Title :   Measurements of Shock Wave Attenuation in Ducts with Large Length-to-Diameter Ratios.

Descriptive Note : Final rept. 3 Apr-25 Nov 69,

Corporate Author : STANFORD RESEARCH INST MENLO PARK CA

Personal Author(s) : Wooldridge, C. E. ; Kier, R. J.

Report Date : 30 NOV 1969

Pagination or Media Count : 49

Abstract : An investigation was conducted to determine the magnitude of viscous attenuation of the shock front in smooth-walled tubes with a length-to-diameter (L/D) ratio of 600. The tests were carried out in a hydrogen driven shock tube of 0.485-inch inside diameter, with air and sulfur hexafluoride as the driven gases. The pressure in the driven section was held at 1 atmosphere for the tests ranging up to a Mach number of 8.9. It was reduced below 1 atmosphere at higher mach numbers in order to avoid heating. The incident shock produced a square pressure pulse. The initial shock Mach numbers were varied from about 3.5 to 15.7. The corresponding initial shock overpressure ratios varied from about 15 to 250. (Author)

Descriptors :   (*FALLOUT SHELTERS, EXPLOSION EFFECTS), (*DUCTS, SHOCK WAVES), (*SHOCK WAVES, ATTENUATION), MEASUREMENT, VENTILATION DUCTS, SHOCK TUBES, PRESSURE.

Subject Categories : Structural Engineering and Building Technology
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE