Coupled Vortex Transport Method and RANS CFD for V
at ORAU Workforce Solutions

Date Posted: 3/23/2019

Opportunity Description

Computational fluid dynamics have demonstrated significant improvements in rotorcraft aerodynamics and wake geometry predictions over lifting line and vortex filament methods. Most CFD calculations use Reynolds-Averaged Navier-Stokes (RANS) methods, but some researchers have investigated the vorticity transport form of the Navier-Stokes equations, in both traditional gridded and gridless, vortex particle-based formulations. Because vertical lift platforms operate in the subsonic airspeed range, and rotor airloads are highly dependent on the wake geometry and strength, vortex methods can potentially capture the far-field wake vorticity with lower dissipation than RANS methods. Many researchers have coupled traditional lifting line aerodynamics with high-fidelity vorticity transport calculations, but few have attempted coupling conventional RANS CFD and vorticity transport methods . ARL-VTD is interested in investigating vorticity transport for aerodynamics around both manned rotorcraft and small, flapping wing unmanned vehicles. Vorticity sources should be calculated from a conventional CFD calculation for the near body to produce a high fidelity, first principles calculation of the entire flow field. The analysis should also be parallel and scalable to take advantage of distributed memory high performance computing resources available to the Army.

Opportunity Snapshot

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Grooming future leaders in science and technology requires enhancing the skills, knowledge and experience of workers early in their careers. To that end, ORAU (Oak Ridge Associated Universities) assists in connecting the best and most diverse students, recent graduates, faculty and professionals with world-class fellowships, internships and jobs, whether in national laboratories, research institutions, federal government offices or private sector R&D departments.

ORAU works with agencies such as the U.S. Army Research Laboratory (ARL) Research Associateship Program (RAP) allow Postdoctoral Fellows, Journeyman Fellows (undergraduate and graduates students and recent graduates), Senior Researchers, and Summer Faculty engage in research initiatives of their own choice, that are compatible with the interests of the government and will potentially contribute to the general effort of the ARL. We work with the Environmental Protection Agency (EPA) to place recent graduates in full-time and part-time jobs in the Office of Research and Development at EPA under the National Student Services Contract. ORAU also works with Center for Medicare and Medicaid Innovation.

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