Accession Number:

AD0729670

Title:

Explosion Product Disposition in the Conical Shock Tube,

Descriptive Note:

Corporate Author:

NAVAL ORDNANCE LAB WHITE OAK MD

Personal Author(s):

Report Date:

1971-07-22

Pagination or Media Count:

52.0

Abstract:

A series of 300 gm pentolite charges has been fired in the NOL 180-ft Conical Shock Tube CST. Parameters examined were drag force on a cylinder exposed side-on to the flow, temperature at a thermocouple inserted through the wall, opacity to visible light near the wall, side-on overpressure at the wall, and luminosity in the firing chamber. Dust left on the walls from previous firings is lifted into a boundary layer by a succeeding shot the result is a distortion of dynamic pressure from the anticipated smooth decay. There appears to be two slugs of hot gas moving down the tube behind the blast front. These mix, cool, and become indistinguishable about half way down the tube. Photographs of firing chamber liminosity strongly imply a turbulent boundary layer choke near the muzzle. Side-on overpressure records contained no surprises relative to previous work at similar gage locations. Author

Subject Categories:

  • Test Facilities, Equipment and Methods
  • Ammunition and Explosives
  • Explosions
  • Ballistics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE