Accession Number:

ADA190786

Title:

Cars Temperature Measurements in the Muzzle Flash Region of a 7.62 mm Rifle

Descriptive Note:

Final rept. Jan 1984-Oct 1987

Corporate Author:

ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD

Report Date:

1987-11-01

Pagination or Media Count:

47.0

Abstract:

Temperature in the muzzle flash region of a 7.62 mm rifle M-14 have been obtained by a nonlinear least squares analysis of coherent anti-Stokes Raman scattering CARS spectra of the carbon monoxide molecule. The experimental procedure involved firing a modified M-14 rifle into a large metal box where argon, nitrogen and air were used as fill gases. The resulting muzzle flash radiation has been sampled by emission spectroscopy to give temperature estimates using blackbody radiation laws. The muzzle flow field has been probed by a He-Ne laser beam to investigate light transmission properties as a function of time. Temporally and spatially resolved temperatures in the flow field have been determined by probing with high intensity pulsed lasers which generating beams are enclosed in small tubes, the CARS derived temperatures in the intermediate flash region range from 1468 K at 0.70 ms down to about 500 K at 1. 53 ms. These spatially resolved results compare favorably with the most recent other muzzle flash temperature studies.

Subject Categories:

  • Physical Chemistry
  • Guns

Distribution Statement:

APPROVED FOR PUBLIC RELEASE