Improved Modeling Tools for High Speed Reacting Flows

Award Information
Agency:
Department of Defense
Branch
Air Force
Amount:
$99,977.00
Award Year:
2005
Program:
SBIR
Phase:
Phase I
Contract:
FA8650-05-M-2595
Award Id:
73103
Agency Tracking Number:
F051-194-2007
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
COMBUSTION RESEARCH & FLOW TECHNOLOGY, INC. (Currently Combustion Research and Flow Technology)
6210 Keller's Church Road, Pipersville, PA, 18947
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
929950012
Principal Investigator:
Sanford Dash
President & Chief Scientist
(215) 766-1520
dash@craft-tech.com
Business Contact:
Sanford Dash
President & Chief Scientist
(215) 766-1520
dash@craft-tech.com
Research Institution:
n/a
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.

* information listed above is at the time of submission.

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