Education

Research Description

Dr. Edwards is interested in computational fluid dynamics (CFD), 2D and 3D compressible flows, reactive and multi-phase flows, and turbulence modeling. Dr. Edwards is currently 1) developing large eddy simulation techniques for high speed internal flows in advanced engine concepts (ram jets, scram jets, etc.), 2) conducting simulations of entry/exit into collective protection systems designed to enable operation in contaminated environments, and 3) developing multi-phase flow simulation methods as applied to industrial/medical processes. He is Principal Investigator of the Aerospace Engineering Computational Fluid Dynamics Laboratory. In MAE, he collaborates with Dr. Dow, Dr. Eischen, Dr. Hassan, Dr. Luo, Dr. Fang, and Dr. Gopalarathnam.

Publications

Turbulence/chemistry interactions in a ramp-stabilized supersonic hydrogen-air diffusion flame

Fulton, J. A., Edwards, J. R., Cutler, A., McDaniel, J., & Goyne, C. (2016), Combustion and Flame, 174, 152-165.

Scramjet combustion efficiency measurement via tomographic absorption spectroscopy and particle image velocimetry

Busa, K. M., Rice, B. E., McDaniel, J. C., Goyne, C. P., Rockwell, R. D., Fulton, J. A., Edwards, J. R., & Diskin, G. S. (2016), AIAA Journal, 54(8), 2463-2471.

A fine-grained block ILU scheme on regular structures for GPGPUs

Luo, L. X., Edwards, J. R., Luo, H., & Mueller, F. (2015), Computers & Fluids, 119, 149-161.

Large-eddy/Reynolds-averaged Navier-Stokes simulation of cavity-stabilized ethylene combustion

Potturi, A. S., & Edwards, J. R. (2015), Combustion and Flame, 162(4), 1176-1192.

Discrete-vortex method with novel shedding criterion for unsteady aerofoil flows with intermittent leading-edge vortex shedding

Ramesh, K., Gopalarathnam, A., Granlund, K., Ol, M. & Edwards, J. (2014), Journal of Fluid Mechanics, 751.

Mach 6 wake flow simulations using a large-eddy simulation/Reynolds-averaged Navier Stokes model

Salazar, G., & Edwards, J. R. (2014), Journal of Spacecraft and Rockets, 51(4), 1329-1348.

Mach 6 wake flow simulations using a large-eddy simulation/Reynolds-averaged Navier Stokes model

Salazar, G., & Edwards, J. R. (2014), Journal of Spacecraft and Rockets, 51(4), 1329-1348.

Discrete-vortex method with novel shedding criterion for unsteady aerofoil flows with intermittent leading-edge vortex shedding

Ramesh, K., Gopalarathnam, A., Granlund, K., Ol, M. V., & Edwards, J. R. (2014), Journal of Fluid Mechanics, 751, 500-538.

Large-eddy simulation/reynolds-averaged navier-stokes simulations of high-speed mixing processes

Zilberter, I. A., & Edwards, J. R. (2014), AIAA Journal, 52(7), 1486-1501.

Hybrid large-eddy/reynolds-averaged navier-stokes simulations of flow through a model scramjet

Potturi, A. S., & Edwards, J. R. (2014), AIAA Journal, 52(7), 1417-1429.

View all publications via NC State Libraries

Grants

LES modeling for prediction of lean blowoff

Air Force Research Laboratory (AFRL)(6/22/16 - 4/20/17)

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LES modeling for prediction of lean blowoff

Sponsor: Air Force Research Laboratory (AFRL)

Start Date: 6/22/16

End Date: 4/20/17

Abstract

NCSU will assist Metacomp Technologies in the development of novel strategies for predicting lean blowoff propulsion systems operating at Air Force relevant conditions including high pressures, high-speed compressible flows, and high turbulence intensities. The development of models for the filtered chemical production rates that account for finite rate effects, do not presume a flame structure, and are affordable for use in a large-eddy simulation will be the primary focus. Transport-PaSR models and local least-squares models will be considered initially.

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Collaborative Research:Turbulent Flame Structure of Cavity Stabilized Reacting Shear Layers: Effects of Flow Compressibility, Heat Release, and Finite-rate Kinetics

National Science Foundation (NSF)(6/01/15 - 5/31/18)

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Collaborative Research:Turbulent Flame Structure of Cavity Stabilized Reacting Shear Layers: Effects of Flow Compressibility, Heat Release, and Finite-rate Kinetics

Sponsor: National Science Foundation (NSF)

Start Date: 6/01/15

End Date: 5/31/18

Abstract

This effort, conducted in collaboration with the University of Virginia and Sandia National Labs, will utilize DNS, LES, and experiment to investigate the role of compressibility on flameholding at high speed, high turbulence intensity conditions.

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Volatile Organic Chemical Signature Modeling #2

Air Force Research Laboratory (AFRL)(9/01/14 - 12/05/16)

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Volatile Organic Chemical Signature Modeling #2

Sponsor: Air Force Research Laboratory (AFRL)

Start Date: 9/01/14

End Date: 12/05/16

Abstract

This work will conduct numerical simulations of human-induced VOC emissions and transport using NCSU's REACTMB flow solver. The results will be analyzed to understand how person-specific VOC signatures evolve during realistic operational situations. This work is in support of a Phase II SBIR proposed by Toyon Research Corporation to AFRL.

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Improved Numerical Simulations of Barbotage Atomization

Air Force Research Laboratory (AFRL)(1/01/14 - 8/14/16)

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Improved Numerical Simulations of Barbotage Atomization

Sponsor: Air Force Research Laboratory (AFRL)

Start Date: 1/01/14

End Date: 8/14/16

Abstract

This work will develop new computational models for simulating 'barbotage' fuel injection. Results will be compared with experimental data collected by Taitech personnel at AFRL and at Argonne National Laboratories.

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Effects of Heat Release on Shock-Train Development in COIL Laser Diffusers

Air Force Research Laboratory (AFRL)(4/01/15 - 8/31/16)

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Effects of Heat Release on Shock-Train Development in COIL Laser Diffusers

Sponsor: Air Force Research Laboratory (AFRL)

Start Date: 4/01/15

End Date: 8/31/16

Abstract

This proposal will continue an investigation into the causes of large-scale unsteadiness in COIL lasing systems. The effects of heat release and chemical conversion on shock-train development and unsteadiness will be specifically investigated. Large-eddy / Reynolds-averaged Navier-Stokes simulation methods developed at NCSU will be employed.

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Modeling of Supersonic Separators for Chemical Co-Product Removal

Eastman Chemical Company(9/25/13 - 3/31/15)

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Modeling of Supersonic Separators for Chemical Co-Product Removal

Sponsor: Eastman Chemical Company

Start Date: 9/25/13

End Date: 3/31/15

Abstract

This work will investigate supersonic separation concepts as a way of removing undesired condensables from gas-phase processes of interest to Eastman.

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Volatile Organic Chemical Signature Modeling

Air Force Research Laboratory (AFRL)(9/01/13 - 4/14/14)

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Volatile Organic Chemical Signature Modeling

Sponsor: Air Force Research Laboratory (AFRL)

Start Date: 9/01/13

End Date: 4/14/14

Abstract

This work will conduct numerical simulations of human-induced VOC emissions and transport using NCSU's REACTMB flow solver. The results will be analyzed to understand how person-specific VOC signatures evolve during realistic operational situations. This work is in support of a Phase I SBIR awarded to Toyon Research Corporation

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Co-Design of Hardware / Software for Predicting MAV Aerodynamics

US Air Force - Office of Scientific Research (AFOSR)(9/01/12 - 10/31/15)

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Co-Design of Hardware / Software for Predicting MAV Aerodynamics

Sponsor: US Air Force - Office of Scientific Research (AFOSR)

Start Date: 9/01/12

End Date: 10/31/15

Abstract

This proposal provides subcontractor support to Virginia Tech for a proposal submitted under the Air Force's Basic Research Initiative. The proposal will focus on development of reconfigurable mapping strategies for porting multi-block structured and unstructured-mesh CFD codes to computing clusters containing CPU/GPU processing units.

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Large-Eddy / Reynolds-Averaged Navier-Stokes Simulations of COIL Laser Pressure-Recovery Systems

Air Force Research Laboratory (AFRL)(1/07/13 - 6/06/14)

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Large-Eddy / Reynolds-Averaged Navier-Stokes Simulations of COIL Laser Pressure-Recovery Systems

Sponsor: Air Force Research Laboratory (AFRL)

Start Date: 1/07/13

End Date: 6/06/14

Abstract

This project will apply large-eddy / Reynolds-averaged Navier-Stokes turbulence simulation strategies to examine flowfields characteristic of COIL laser pressure-recovery systems. The simulations will emphasize the effects of transition to turbulence and heat release on the structure and stability of shock-train patterns formed in the diffuser section.

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Theoretical and Computational Modeling of Two-Dimensional and Three-Dimensional Dynamic Stall for Rotorcraft Applications

US Army - Army Research Office(3/15/13 - 12/31/16)

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Theoretical and Computational Modeling of Two-Dimensional and Three-Dimensional Dynamic Stall for Rotorcraft Applications

Sponsor: US Army - Army Research Office

Start Date: 3/15/13

End Date: 12/31/16

Abstract

In this project, we will computational fluid dynamics studies of two-dimensional and three-dimensional simulations of dynamic stall to guide the development of low-order prediction methods and to gain insight into the flow physics.

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