Accession Number:

ADA230901

Title:

A Comparison of Experimental and Numerical Blast Data for Perforated Muzzle Brakes

Descriptive Note:

Final rept.

Corporate Author:

ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER WATERVLIET NY BENET LABS

Personal Author(s):

• Carofano, G. C.

Report Date:

1990-12-01

Pagination or Media Count:

29.0

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 Dillons 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.

Descriptors:

• *WEAPONS
• GASES
• FREE FIELD
• FLOW FIELDS
• PULSES
• VALUE
• GUNS
• THRUST
• BLAST
• NEAR FIELD
• BRAKES
• GUN MUZZLES
• SPARK SHADOWGRAPH PHOTOGRAPHY
• PERFORATION
• VENTS
• MUZZLE VELOCITY
• VENTING
• MUZZLE BRAKES
• MATHEMATICAL MODELS

Subject Categories:

• Guns

Distribution Statement:

APPROVED FOR PUBLIC RELEASE