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Improved Modeling Tools for High Speed Reacting Flows

Award Information

Agency:
Department of Defense
Branch:
Air Force
Award ID:
73103
Program Year/Program:
2005 / SBIR
Agency Tracking Number:
F051-194-2007
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Combustion Research and Flow Technology, Inc.
6210 Kellers Church Road Pipersville, PA 18947-1020
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 2005
Title: Improved Modeling Tools for High Speed Reacting Flows
Agency / Branch: DOD / USAF
Contract: FA8650-05-M-2595
Award Amount: $99,977.00
 

Abstract:

Recent work in high speed reacting flows has identified three areas in which model improvements are needed. (1) Multi-element grid adaptation for fuel injection problems - h-refinement (cell splitting) procedures being utilized in our grid adaptation tool, CRISPr, produce large meshes after several levels of refinement. Point redistribution (r-refinement) techniques based on moving mesh concepts can improve efficiency and will be implemented. (2) Scalar fluctuation modeling for high speed flows - a generalized framework is operational which predicts local values of Prt and Sct and works with our compressibility-corrected k model. Application to basic jet/shear layer flows has indicated good overall performance, but application to fuel injection flow problems has indicated that further turbulence modeling upgrades are required, which will be addressed in this program. (3) Chemical kinetic efficiency enhancement - using point implicit methodology with an iterative chemical kinetic solver leads to load unbalances since more work is done in regions with stiff chemistry. A new "work per node" load balancing technique, has permitted us to analyze hydro-carbon chemical systems with a large number of species and reactions with much greater efficiency. We will incorporate this procedure into our multi-element unstructured code, and make it operate with grid adaptation techniques.

Principal Investigator:

Sanford M. Dash
President & Chief Scientist
2157661520
dash@craft-tech.com

Business Contact:

Sanford M. Dash
President & Chief Scientist
2157661520
dash@craft-tech.com
Small Business Information at Submission:

COMBUSTION RESEARCH & FLOW TECHNOLOGY, INC.
6210 Keller's Church Road Pipersville, PA 18947

EIN/Tax ID: 232759059
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No