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Turbulent Combustion Interaction Models for LES Simulations of High Speed Flow

Award Information

Department of Defense
Office of the Secretary of Defense
Award ID:
Program Year/Program:
2012 / STTR
Agency Tracking Number:
Solicitation Year:
Solicitation Topic Code:
Solicitation Number:
Small Business Information
Cascade TechNologies, Inc.
2445 Faber Place Suite 100 Palo Alto, CA 94303-3347
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Phase 2
Fiscal Year: 2012
Title: Turbulent Combustion Interaction Models for LES Simulations of High Speed Flow
Agency / Branch: DOD / OSD
Contract: FA8650-12-C-2246
Award Amount: $749,975.00


This work will develop and validate a high-fidelity LES combustion model based on Flamelet Progress Variable approach for accurate prediction of high-speed turbulent combustion. The flamelet-modeling paradigm facilitates consideration of detailed reaction chemistry and complex turbulence-chemistry interaction, which is critical for high-speed hydrocarbon combustion. A work plan is proposed that integrates systematic model analysis using relevant DNS databases, algorithmic developments, and model validation against relevant experimental data. The Phase-II efforts will address critical modeling aspect that have been identified in Phase I in association with the prediction of JICF autoignition regimes, air-fuel mixing, and heat-transfer. To this end, it is proposed to develop and implement an unsteady flamelet progress-variable model in order to provide an accurate description of transient ignition regimes that are present in high-speed turbulent combustion regimes. To enable a computationally efficient chemistry representation technique that provides a rigorous error control, in situ adaptive tabulation (ISAT) will be employed. The unsteady flamelet-model will be extended to include the effect of heat losses. The models will be implemented in Cascade"s state-of-the-art unstructured LES solver, CharLES and it be used to simulate the HIFIRE Direct Connect Rig experiment for which a proof of concept LES was demonstrated in Phase I.

Principal Investigator:

Hung Le
General Manager
(650) 521-0243

Business Contact:

Donna Carrig
Chief Financial Officer
(650) 521-0243
Small Business Information at Submission:

Cascade Technologies Incorporated
2445 Faber Place #100 Palo Alto, CA -

EIN/Tax ID: 043353686
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
Research Institution Information:
University of Michigan
Wolverine Tower,1st Flr,R1066
3003 South State Street
Ann Arbor, MI 48109-1274
Contact: Krista L. Campeau
Contact Phone: (734) 936-1289