A Comparison of Experimental and Numerical Blast Data for Perforated Muzzle Brakes
Abstract
A perforated muzzle brake consists of a set of vents drilled through the wall of a canon near the muzzle, while venting reduces the axial thrust produced by the gas at the muzzle, thereby effecting a decrease in weapon impulse, the redirected exhaust increases blast levels upstream of the muzzle. The problem is to design a cannon brake system which yields specified values of muzzle velocity and weapon impulse but minimizes the blast increase. A numerical model of the blast field produced by a cannon having a perforated muzzle brake was previously developed. The results compared favorably with Dillon's near-field shadowgraph data for a 20-mm cannon. This report describes improvements to the model and compares the predictions with free-field blast data for small and large caliber cannon. The results show good agreement with data for a 20-mm cannon and satisfactory agreement with data for 105-mm and 120-mm cannon.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1990
- Accession Number
- ADA230901
Entities
People
- G. C. Carofano
Organizations
- United States Army Armament Research, Development and Engineering Center