Accession Number : ADA290199

Title :   Computational Fluid Dynamics (CFD) Simulation of Test Chamber and Smoke-Generating Device.

Descriptive Note : Final rept. Dec 93-Aug 94,

Corporate Author : ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD

Personal Author(s) : Nusca, Michael J.

PDF Url : ADA290199

Report Date : JAN 1995

Pagination or Media Count : 44

Abstract : The U.S. Army Research Laboratory (ARL) has completed an initial investigation of the flow field within a typical U.S. Army Edgewood Research, Development, and Engineering Center (ERDEC) test chamber via numerical simulation. The ERDEC test chamber is designed to mix compressor-driven airflow with gas/solid effluent from a test article placed inside the chamber. An example of such a test article is a smoke generator, or smoke pot. Simulation of this flow utilized ARL computational fluid dynamics (CFD) codes that include multispecies chemical kinetics. Numerical solutions of the gas flow and effluent concentration distributions in the test chamber were generated for operating times up to 4.5 min. Numerical simulations reveal that certain values of chamber through-flow induce flow patterns within the chamber that are dominated by rotating vortices. This flow pattern increases the effluent residence time in the chamber as well as the mixing of gas/particulate from the test article with air. As a result, pockets of high effluent concentration can form in the chamber. Graphical results with discussion are presented.

Descriptors :   *COMPUTATIONAL FLUID DYNAMICS, *FLOW FIELDS, *SMOKE GENERATORS, MATHEMATICAL MODELS, SIMULATION, ARMY RESEARCH, HIGH RATE, REACTION KINETICS, NUMERICAL ANALYSIS, TURBULENCE, VORTICES, GASES, COMBUSTION, SOLUTIONS(GENERAL), FLOW RATE, CONCENTRATION(COMPOSITION), PATTERNS, COMPUTER GRAPHICS, PARTICULATES, MIXING, EFFLUENTS, NAVIER STOKES EQUATIONS, TEST FACILITIES, CHAMBERS, DISTRIBUTION FUNCTIONS, GAS FLOW.

Subject Categories : Fluid Mechanics
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE