Velocity and Pressure Distributions in the Liquid Reservoir in a Regenerative Liquid Propellant Gun
Abstract
A number of models are now availa ble describing the ballistic process in a regenerative liquid propellant gun. These models have considered the performance of the regenerative liquid propellant gun system and demonstrated reasonable correlation with experimental results. Many details of the process are not well understood and have not been incorporated into the models. In an effort to describe one aspect of the system, the authors have developed a lumped-parameter model for the injection of liquid propellant into the combustion chamber, and applied a continuum analysis to obtain velocity and pressure profiles of the liquid propellant in the liquid reservoir. The problem is complicated by the cross-sectional area change of the liquid in the reservoir resulting from the piston and center bolt contours. In addition, since the piston slides rearward during the injection process, the area is also time- dependent. In this paper the authors extend the development to a full treatment of the velocity and pressure distributions. The distributions are developed from continuity and momentum equations which include area change with time and axial position. The Lagrange approximation, i.e. zero density gradient in the liquid, is invoked to simplfy the equations of motion.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1988
- Accession Number
- ADA201103
Entities
People
- Gloria P. Wren
- Walter F. Morrison
Organizations
- Ballistic Research Laboratory