Accession Number:

ADA238628

Title:

Experimental Hypervelocity Firings Using Stick and Granular Propellant Configurations

Descriptive Note:

Final rept. Jan-Dec 1989

Corporate Author:

ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s):

• Ruth, Carl R.
• Robbins, Frederick W.
• Horst, Albert W.

Report Date:

1991-06-01

Pagination or Media Count:

47.0

Abstract:

The suitability of lumped-parameter interior ballistic models for prediction of the interior ballistic performance of very high velocity guns is limited by use of a predetermined pressure gradient which is superimposed on the solution to approximate the relationship between space-mean, breech and projectile base pressures. Even modern two-phase flow interior ballistic models, specifically formulated to address the hydrodynamics of the problem, have not been extensively exercised in this regime. Only recently have limited, large- caliber gun firings with realistic projectile masses been conducted to provide required data in this velocity regime. In this study, firings were conducted in a long 120-mm gun at propellant charge to projectile mass ratios CM of about 3 to 6, yielding muzzle velocities in the 2 - 2.7 kms range. The tube was instrumented with pressure gages at various locations along its length to provide data for comparison to predictions of various interior ballistic codes.

Descriptors:

• *HYPERSONIC VELOCITY
• *PROPELLANT GRAINS
• VELOCITY
• PRESSURE GRADIENTS
• RATIOS
• PREDICTIONS
• MODELS
• PARAMETERS
• FIRING TESTS(ORDNANCE)
• MASS
• PROJECTILES
• HIGH VELOCITY
• COMPARISON
• PRESSURE GAGES
• CODING
• CONFIGURATIONS
• CALIBRATION
• GUNS
• BALLISTICS
• HYDRODYNAMICS
• GUNFIRE
• PROPELLING CHARGES
• INTERIOR BALLISTICS
• BASE PRESSURE
• MUZZLE VELOCITY

Subject Categories:

• Ammunition and Explosives
• Ballistics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE