Internal Fluid Dynamics within a Nonspinning Partially Liquid-Filled Shell Due to Burster Rupture

摘要

This forced liquid projectile is being directed by the Munitions Branch of the U.S. Army Chemical Research, Development and Engineering Center (CRDEC). The Computational Aerodynamics Branch, Launch and Flight Division U.S. Army Ballistic Research Laboratory (BRL), has been tasked to determine the internal fluid dynamics within a partially liquid-filled shell subject to large rapidly applied pressures which result from internal burster tube rupture. The main area of concern is the determination of the time history of the internal pressure on the shell sidewalls and base. A numerical model has been developed to simulate the internal fluid dynamics of this partially liquid-filled configuration. This numerical model solves the quasi one-dimensional Euler equations and a equation of state for liquid using the explicit MacCormack numerical technique. Results have been generated for an internal shell geometry currently being tested by the Terminal Ballistics Division (TBD), BRL. Comparisons are made between the numerically predicted pressure levels and the pressure measurements performed by TBD.