NUMERICAL MODELLING OF MIXING AND CHEMICAL REACTIONS IN TURBULENT FLOWS

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: N/A
Agency Tracking Number: 9524
Amount: $49,654.00
Phase: Phase I
Program: SBIR
Awards Year: 1989
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
Po Box 1403, Princeton, NJ, 08540
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Dr Steven A Orszag
 (609) 683-1515
Business Contact
Phone: () -
Research Institution
N/A
Abstract
WE SHALL DEVELOP METHODS TO SOLVE ONE OF THE CRITICAL PROBLEMS OF TURBULENCE MODELLING IN WHICH ALL TRADITIONALLY USED TURBULENCE MODELS FAIL, NAMELY MODELLING OF MIXING AND CHEMICAL REACTIONS IN COMPLEX TURBULENT FLOWS. WE PROPOSE TO DEVELOP A THREE-DIMENSIONAL COMPUTER CODE INCORPORATING RENORMALIZATION-GROUP (RNG) BASED DIFFERENTIAL TRANSPORT MODELS FOR TURBULENT HEAT, MASS, MOMENTUM TRANSFER COMBINED WITH CHEMICAL REACTION PROCESSES IN STRONGLY NON-STATIONARY, TURBULENT FLOWS. PRELIMINARY RESULTS FOR APPLICATION OF THESE NOVEL, NEW MODELS TO NON-STATIONARY AND SEPARATED FLOWS, INCLUDING FLOW OVER A BACKWARD-FACING STEP, OSCILLATORY PIPE FLOW, SHOCK-INDUCED SEPARATION ON AN AIRFOIL, AND LOW AND HIGH PRANDTL NUMBER TURBULENT HEAT TRANSFER SUGGEST THAT THE MODELS WILL BE VERY EFFECTIVE FOR THE PRESENT CLASS OF DIFFICULT FLOWS. IN ADDITION, RECENT EXTENSIONS OF THE RNG METHOD GIVE A DESCRIPTION OF TURBULENT COMBUSTION THAT PROMISES SIGNIFICANT ADVANCES IN OUR ABILITY TO MODEL REACTING FLOW PROBLEMS.

* Information listed above is at the time of submission. *

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