Pressure Distribution and Pumping Force of Discharging Bore Evacuator Holes,
Abstract
Bore evacuator holes are angled toward the muzzle end of a gun tube so that the small jets created during the evacuator discharge will entrain bore gases, forcing them to move toward the muzzle. A control volume analysis of the gas in the tube with an open breech shows that the only force acting in the direction of the muzzle occurs at the nozzle entrance to the tube. The pressure distribution at the nozzle entrance is investigated theoretically and experimentally in this paper. An empirical method of calculating the nozzle pumping force component is presented for 30 deg, 45 deg and 60 deg nozzle angles.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1993
- Accession Number
- ADP009061
Entities
People
- H. J. Sneck
- Mario Rivera
Organizations
- United States Army Armament Research, Development and Engineering Center