Turbulent Combustion Interaction Models for LES Simulations of High Speed Flow

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: FA8650-11-M-2175
Agency Tracking Number: O10B-001-1019
Amount: $99,998.00
Phase: Phase I
Program: STTR
Awards Year: 2011
Solicitation Year: 2010
Solicitation Topic Code: OSD10-T001
Solicitation Number: 2010.B
Small Business Information
Combustion Science & Engineering, Inc.
8940 Old Annapolis Road Suite L, Columbia, MD, -
DUNS: 018413208
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Ponnuthurai Gokulakrishnan
 Principal Engineer
 (410) 884-3266
 pgokulakrishnan@csefire.com
Business Contact
 Michael Klassen
Title: Vice President
Phone: (410) 884-3266
Email: mklassen@csefire.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
Computational Fluid Dynamics (CFD) solvers based on RANS, URANS or LES are required to estimate the filtered reaction rates to account for the turbulent-chemistry interactions for accurate modeling of reactive flows. It is critical to have a reliable reaction rate estimation scheme coupled with turbulent combustion models to estimate filtered reaction rates computationally efficient way. In this work, Combustion Science & Engineering (CSE), Inc. proposes to develop a new technically innovative time-scale based"adaptive chemistry scheme"coupled with off-line Linear Eddy Mixing (LEM) model to evaluate filtered reaction rates for RANS/URANS/LES simulation. This dynamic reduced kinetic modeling approach will reduce the computational cost of chemical source term estimation significantly by reducing the number of species to be evaluated locally as well as reducing the stiffness of the ODEs to be solved. The goal here is to develop a robust and dynamically evolving kinetics model that will be combined with the mixing model of LEM to account for the effect of small time scales of relevance to supersonic combustion. Competition between mixing and molecular processes will also be included to assess the importance of the latter on turbulent-chemistry interaction.

* information listed above is at the time of submission.

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