Chemical Kinetics for Vitiated Flows

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA8650-09-C-2009
Agency Tracking Number: F081-057-0772
Amount: $1,260,400.00
Phase: Phase II
Program: SBIR
Awards Year: 2009
Solicitation Year: 2008
Solicitation Topic Code: AF081-057
Solicitation Number: 2008.1
Small Business Information
Combustion Science & Engineering, Inc.
8940 Old Annapolis Road Suite L, Columbia, MD, 21045
DUNS: 018413208
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Michael Klassen
 Principal Research Engine
 (410) 884-3266
Business Contact
 Richard Roby
Title: President / Technical Dir
Phone: (410) 884-3266
Research Institution
The flame stability in typical augmenters is largely determined by vitiated air composition and high preheat temperature of the incoming flow. Presence of significant quantities of CO2 and H2O in the vitiated air will affect the oxidation characteristics of jet fuels by increasing the third-body collision efficiencies of initiation and recombination reactions. Traditionally, kinetic models are validated against data acquired for unvitiated air. Thus, it is essential to validate the kinetic models against data obtained at typical augmenter operating conditions. Combustion Science & Engineering, Inc. proposes to acquire new experimental data using vitiated air at low pressures for JP8 and S8 fuels. The data will include sub-atmospheric pressure ignition delay time data (at CSE), atmospheric laminar flame speed data (at Georgia Tech) and sub-atmospheric pressure laminar flame speed experiments (at Princeton University). CSE will also develop a model reduction tool to generate reduced models from detailed kinetic mechanisms that are validated against the experimental data acquired in this project. These reduced kinetic models can be implemented in CFD for practical augmenter simulations for commercial applications. BENEFIT: The ultimate result of this research will be the development of a CFDC modeling tool that will be useful for engineers to design augmentors and other flameholding devices in practical applications. This will provide a design tool for predicting static stability limits and flame propagation in afterburner combustion systems. The market for this product will include gas turbine designers and manufacturers for both military and civilian aircraft. The use of this tool will significantly reduce development costs by eliminating some design iterations and hardware testing, which is quite expensive and time-consuming.

* information listed above is at the time of submission.

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