Augmentor Ignition/Extinction Modeling

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA8650-07-M-2765
Agency Tracking Number: F071-175-0124
Amount: $99,942.00
Phase: Phase I
Program: SBIR
Awards Year: 2007
Solicitation Year: 2007
Solicitation Topic Code: AF071-175
Solicitation Number: 2007.1
Small Business Information
6210 Keller's Church Road, Pipersville, PA, 18947
DUNS: 929950012
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 William Calhoon
 Senior Research Scientist
 (256) 883-1905
Business Contact
 Neeraj Sinha
Title: Vice President & Technical Director
Phone: (215) 766-1520
Research Institution
The technical objective of this program is to develop a fast running, subgrid scale turbulence-chemistry interaction model for large-eddy simulation (LES) of aircraft augmentors that can accurately capture extinction and ignition effects. To accurately capture extinction and ignition, this model will be based upon a parameterization of the linear-eddy model (LEM). The LEM is a comprehensive mixing model that separately treats molecular diffusion, small scale turbulent stirring and complex, finite-rate kinetics. Because the model resolves the microscale flame structure, extinction and ignition may be accurately captured. Under this program, statistics from this mixing model will be parameterized to form a computationally inexpensive run time model. This parameterization will be accomplished using the artificial neural network (ANN) data modeling technique. The resulting computational model will be a fast running ANN network to estimate the LES filtered reaction rate required by CFD flow solvers. The key advantage of this LEM based ANN modeling approach is that the filtered reaction rate will include within it the effects of subgrid diffusion, turbulent stirring by a range of eddies below the grid size and the response of the chemical composition to these effects.

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

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