Accession Number:

ADB014175

Title:

Investigations of Transitional Ballistics in Muzzle Jet Flow Simulators

Descriptive Note:

Final rept.

Corporate Author:

ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s):

Report Date:

1976-09-01

Pagination or Media Count:

39.0

Abstract:

Two muzzle jet flow simulators which use clean propelling gases of known properties are described. Photographs and pressure data obtained in the simulators as a jet forms behind a shock wave which has left the simulator muzzle are shown and discussed. Of particular interest is an experiment using a ruby laser as a multiple-pulse light source to obtain a sequence of several laser interferograms for a single run from which quantitative data can be obtained. It was shown that the growth of the outer shock wave obeys a power law in time the exponent n is approximately 0.715. Scaling of the inner shock wave development is also discussed. Inner and outer shock wave motion appeared to be coupled in the quasi-steady flow regime. Spark shadow photographs of jet formation after a projectile uncorks the muzzle are also shown and discussed-- optical probing of the real environment near the muzzle of guns is virtually impossible.

Subject Categories:

  • Photography
  • Ballistics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE