Stability Models for Augmentor Design Tools and Technology Assessment

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA9550-06-C-0124
Agency Tracking Number: F064-033-0053
Amount: $99,775.00
Phase: Phase I
Program: STTR
Awards Year: 2007
Solicitation Year: 2006
Solicitation Topic Code: AF06-T033
Solicitation Number: N/A
Small Business Information
812 Esplanada Way, Stanford, CA, 94305
DUNS: 179576715
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Robert Moffat
 Senior Fellow
 (650) 799-5594
Business Contact
 Parviz Moin
Title: President
Phone: (650) 224-4882
Research Institution
 Godfrey Mungal
 Bldg 520, Rm K
Stanford, CA, 94305
 (650) 725-2019
 Nonprofit college or university
We are proposing a joint experimental/modeling and computational study to develop stability models for CFD codes to design advanced augmentors. Experiments will be conducted at the Research Institution to address various issues related to augmentor stability under vitiated conditions. A stream of vitiated air will be established within an existing vertical wind tunnel. Fuel jets in crossflow and bluff body stabilized jets will be placed into this stream. Available state-of-the-art measurement instruments and visualization techniques will enable us to study the role of vitiation and bluff body shedding upon the jet mixing, flame stabilization, and the downstream jet development. Moreover the effects of changes in altitude will be imitated and studied by varying the jet to momentum crossflow ratio. At our firm, a highly sophisticated, fully unstructured, multi-physics LES code for compressible turbulent combustion already exists. A newly developed auto-ignition model will first be extended for vitiated combustion conditions, and then validated against Cabra et al.'s detailed experiments of reactive flows in vitiated environments. Next, LES simulations of augmentor type geometries will be performed and validated against data from the Research Institution. Using experimental and simulation results, reduced stability models and novel flame holding concepts will be suggested and evaluated.

* information listed above is at the time of submission.

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