Accession Number:

ADA218823

Title:

A Modified LaGrange Pressure Gradient for the Regenerative Liquid Propellant Gun

Descriptive Note:

Technical rept.

Corporate Author:

ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD

Report Date:

1990-01-01

Pagination or Media Count:

57.0

Abstract:

A modified Lagrange gradient model for use in lumped parameter simulations of the regenerative liquid propellant gun is presented. The model accounts for the non-zero gas velocity at the barrel entrance and the rarefaction wave traveling along the barrel toward the projectile base after all-burnt in a regenerative liquid propellant gun RLPG. Computer simulations of a high velocity cannon have been conducted using a lumped parameter code with the modified Lagrange gradient and a second lumped parameter code with a one- dimensional barrel flow model. Comparisons of muzzle velocities, pressure versus time curves, and velocity and pressure profiles in the barrel are presented. The modified Lagrange gradient model provides results which are nearly indistinguishable from those obtained using the one dimensional model over the entire ballistic cycle. Calculated muzzle velocities agree to within 1-3 over the range 1500-2000 ms, with the best agreement at the lower velocities. Interior ballistics.

Subject Categories:

  • Ballistics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE