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RAP opportunity at Air Force Science and Technology Fellowship Program     AF STFP

Turbulent Combustion Modeling of High-speed Air-breathing Components


Aerospace Systems Directorate, RQ/High Speed Systems Division

opportunity location
13.30.11.C0236 Wright-Patterson AFB, OH 454337542


name email phone
Ez Adel Hassan 561.541.5529


           High-fidelity analysis tools of high-speed system components such as flameholders and isolators are critical to prediction of performance and operability of air-breathing systems. Scale-resolving numerical simulations of the internal flow field present a major challenge due to computational cost and the strong coupling of physical phenomena including turbulent mixing and combustion, chemical-kinetics, and shock/boundary layer interactions. During the past few years, careful modeling efforts combined with large computational resources lead to progress in the ability of the computational models to accurately predict the internal flowfield of different components. Major challenges, however, still exist to increase the applicability, reliability, and performance of the state of the art. Research is needed in the following areas 1) Advanced analysis methods of  large time-resolved simulation data, 2) Efficient implicit methods of the coupled transport equations, 3) Hydrocarbon chemistry kinetics reduction, 4) Analysis of scramjet components and comparison to experimental data, 5) Turbulent combustion subgrid modelling approaches, 6) Efficient wall modeling for Large Eddy simulation

D.Gonzalez-Juez, E., Kerstien, A. R., Ranjan, R., and Menon, S., "Advances and challenges in modeling high-speed turbulent combustion in propulsion systems," Progress in Energy and Combustion Science Vol. 60, 2017. doi: 10.1016/j.pecs.2016.12.003

Hassan, E., Luke, E., Walters, K., Peterson, D., Eklund, D., and Hagenmaier, M., "Computations of a Hydrogen-Fueled Scramjet Combustor on Locally Refined Meshes," Flow, Turbulence and Combustion Vol. 99, No. 2, 2017, pp. 437-459.

Hassan, E., Peterson, D. M., Walters, K., and Luke, E., "Dynamic Hybrid Reynolds-Averaged Navier-Stokes/Large-Eddy Simulation of a Supersonic Cavity," Journal of Propulsion and Power Vol. 32, 2016, pp. 1343-1352.

key words
Supersonic Combustion; Turbulent Combustion; Hybrid RANS/LES; Scramjet; Flameholding


Citizenship:  Open to U.S. citizens
Level:  Open to Postdoctoral and Senior applicants


Base Stipend Travel Allotment Supplementation
$95,000.00 $5,000.00

Experience Supplement:
Postdoctoral and Senior Associates will receive an appropriately higher stipend based on the number of years of experience past their PhD.

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