Investigations of Transitional Ballistics in Muzzle Jet Flow Simulators
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1976
- Accession Number
- ADB014175
Entities
People
- Fritz H. Oertel Jr.
Organizations
- Ballistic Research Laboratory