Accession Number : ADA305179

Title :   Reacting Flow Simulation for a Large-Scale Ram Accelerator.

Descriptive Note : Final rept. Jan-Dec 94,

Corporate Author : ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s) : Nusca, Michael J.

PDF Url : ADA305179

Report Date : FEB 1996

Pagination or Media Count : 46

Abstract : Computational fluid dynamics solutions of the full Navier-Stokes equations have been used to numerically simulate the reacting in-bore flow field for the ram accelerator projectile propulsion system. In this system, a projectile and obturator are injected at supersonic velocity into a stationary tube filled with a pressurized mixture of hydrocarbon, oxidizer, and inert gases. Flow stagnation on the obturator initiates combustion of the mixture before it is discarded. A system of shock waves on the projectile, in conjunction with viscous heating, sustains combustion. The resulting energy release travels with the projectile. Numerical simulation utilizing finite-rate chemical kinetics has been used to visualize the flow field, predict the effects of variation in system parameters, and predict projectile in-bore velocity.

Descriptors :   *MATHEMATICAL MODELS, *COMPUTATIONAL FLUID DYNAMICS, *FLOW FIELDS, *NAVIER STOKES EQUATIONS, VELOCITY, SIMULATION, PARAMETERS, PROJECTILES, SHOCK WAVES, NUMERICAL ANALYSIS, ENERGY TRANSFER, GASES, MIXTURES, COMBUSTION, SOLUTIONS(GENERAL), STATIONARY, HYDROCARBONS, HEATING, OXIDIZERS, TRAVEL, FLOW, SUPERSONIC CHARACTERISTICS, VISCOSITY, TUBES, INTERIOR BALLISTICS, STAGNATION.

Subject Categories : Operations Research
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE