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Stability Models for Augmentor Design Tools and Technology Assessment

Award Information

Agency:
Department of Defense
Branch:
Air Force
Award ID:
83308
Program Year/Program:
2008 / STTR
Agency Tracking Number:
F064-033-0053
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Cascade TechNologies, Inc.
2445 Faber Place Suite 100 Palo Alto, CA 94303-3347
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 2
Fiscal Year: 2008
Title: Stability Models for Augmentor Design Tools and Technology Assessment
Agency / Branch: DOD / USAF
Contract: FA9550-08-C-0039
Award Amount: $739,733.00
 

Abstract:

Augmentors, increase the thrust of a gas turbine engine by burning additional fuel with hot engine exhaust gases. Maintaining flame stability over a wide range of operating conditions is desired. An understanding of the effects of geometry and combustion processes on the flame stability is required to design advanced, efficient, and stable augmentors. Key factors affecting flame stability are vitiation level of combustion products entering the augmentor, and flame holder vortex shedding. The effect of vitiated air on flame stability has not been analyzed. Flame holders stabilize the flame by creating recirculation wakes and low speed eddies, allowing more fuel to burn. A detailed computational fluid dynamics (CFD) analysis with state-of-the-art physical and chemical models in required for meaningful numerical simulation of the complex physics encountered which involves rapid mixing, recirculation around flame holders, vortex shedding downstream of the bluff bodies and corresponding instabilities. Another major factor in achieving flame stabilization of vitiated air combustion is the competition of auto-ignition and flame propagation. Therefore, in predictive modeling of augmentors, turbulent partially premixed combustion and propagation by auto-ignition fronts, have to be considered. Appropriate large-eddy simulation (LES) tools will be developed and will be validated against carefully designed experiments.

Principal Investigator:

Shoreh Hajiloo
General Manager
6506916067
hajiloo@turbulentflow.com

Business Contact:

Paviz Moin
President
6502244882
moin@turbulentflow.com
Small Business Information at Submission:

CASCADE TECHNOLOGIES, INC.
1330 Charleston Road Mountain View, CA 94043

EIN/Tax ID: 043353686
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Research Institution Information:
STANFORD UNIV.
320 Panama Street
Stanford, CA 94305
Contact: Sashi Ram
Contact Phone: (650) 723-2968
RI Type: Nonprofit college or university