Turbulent Combustion Interaction Models for LES Simulations of High Speed Flow

Award Information
Agency:
Department of Defense
Branch
Air Force
Amount:
$749,975.00
Award Year:
2012
Program:
STTR
Phase:
Phase II
Contract:
FA8650-12-C-2246
Agency Tracking Number:
O2-1216
Solicitation Year:
2010
Solicitation Topic Code:
OSD10-T001
Solicitation Number:
2010.B
Small Business Information
Cascade Technologies Incorporated
2445 Faber Place, #100, Palo Alto, CA, -
Hubzone Owned:
N
Socially and Economically Disadvantaged:
N
Woman Owned:
N
Duns:
179576715
Principal Investigator:
Hung Le
General Manager
(650) 521-0243
hle@cascadetechnologies.com
Business Contact:
Donna Carrig
Chief Financial Officer
(650) 521-0243
carrig@cascadetechnologies.com
Research Institution:
University of Michigan
Krista L Campeau
Wolverine Tower,1st Flr,R1066
3003 South State Street
Ann Arbor, MI, 48109-1274
(734) 936-1289
Nonprofit college or university
Abstract
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.

* information listed above is at the time of submission.

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