Accession Number : AD0770428

Title :   Particle Penetration into Pitot Gauges in Supersonic Dusty Flows,

Corporate Author : BALLISTIC RESEARCH LABS ABERDEEN PROVING GROUND MD

Personal Author(s) : Gerber,Nathan ; Chou,David ; Sedney,Raymond ; Bartos,Joan

Report Date : OCT 1973

Pagination or Media Count : 37

Abstract : Pitot tube gauges located near the ground are used to measure dynamic pressure in large scale blast tests carried out on desert sites. The penetration of dust particles into the interiors of pitot tubes is studied. The particles are in equilibrium with supersonic airflows behind shock waves propagating into still air. This study is part of an overall effort to determine the effect produced by impact of small particles (e.g., dust raised in strong ground level explosions) on the output of sensors in total pressure gauges. Specifically, hemispherical nose and flat nose pitot tubes are treated, and shock waves traveling with Mach numbers ranging from 2.5 to 10.0 are considered. The corresponding overpressures vary from 6.1 to 115.5 atmospheres. (Modified author abstract)

Descriptors :   *EXPLOSION EFFECTS, *PITOT TUBES, *DUST CLOUDS, *NUCLEAR EXPLOSIONS, DUST, PARTICLES, SURFACE BURST, INSTRUMENTATION, SUPERSONIC FLOW, PARTICLE TRAJECTORIES

Subject Categories : Test Facilities, Equipment and Methods
      Explosions

Distribution Statement : APPROVED FOR PUBLIC RELEASE