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Opportunity at Air Force Research Laboratory (AFRL)

Turbulent Combustion Modeling of High-speed Air-breathing Components

Location

Aerospace Systems Directorate, RQ/High Speed Systems Division

RO# Location
13.30.11.C0236 Wright-Patterson AFB, OH 454337542

Advisers

name email phone
Hassan, Ez Adel ezadelg1@gmail.com 561.541.5529

Description

           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. doi.org/10.1007/s10494-017-9821-2

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. doi.org/10.2514/1.B36132

Keywords:
Supersonic Combustion; Turbulent Combustion; Hybrid RANS/LES; Scramjet; Flameholding

Eligibility

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

Stipend

Base Stipend Travel Allotment Supplementation
$76,542.00 $4,000.00

$3,000 Supplement for Doctorates in Engineering & Computer Science

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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