Accession Number : ADA330546

Title :   A Numerical Study of the Injector Region of the 30-mm Regenerative Liquid Propellant Gun

Descriptive Note : Summary, Jun 93-Feb 95

Corporate Author : ARMY HIGH PERFORMANCE COMPUTING RESEARCH CENTER MINNEAPOLIS MN

Personal Author(s) : Ray, S. E.

PDF Url : ADA330546

Report Date : SEP 1997

Pagination or Media Count : 55

Abstract : A numerical study of the flow of liquid propellant (LP) in a regenerative LP gun (RLPG) is described. The model simulates the flow of LP from the liquid reservoir, through the orifice, and into the combustion chamber. The model is based on a space-time finite element method and can automatically handle the deformation of the computational domain. A mesh moving scheme is used to update the mesh at every time step. Two shots of the 30-mm RLPG are studied. One is a small charge shot, and the other is a medium charge shot. The results from the simulations compare well with data from another numerical model of the RLPG and with experimental data. The simulations provide qualitative details of the transient phenomena that occur in the orifice during the firing cycle. The agreement of the results from the model with experimental data provide confidence in the accuracy of the model. The numerical model will be used to study several RLPG shots under a variety of conditions.

Descriptors :   *FIRING TESTS(ORDNANCE), *LIQUID PROPELLANT GUNS, *INJECTORS, MATHEMATICAL MODELS, FINITE ELEMENT ANALYSIS, COMPUTATIONAL FLUID DYNAMICS, COMPRESSIBLE FLOW, COMBUSTION CHAMBERS, NAVIER STOKES EQUATIONS, ORIFICES, LIQUID GUN PROPELLANTS, BERNOULLI DISTRIBUTION, BULK MODULUS.

Subject Categories : Guns
      Fluid Mechanics
      Ammunition and Explosives

Distribution Statement : APPROVED FOR PUBLIC RELEASE