Opportunity at Air Force Research Laboratory (AFRL)
Computational Fluid Dynamics Research in Numerical Simulation of Turbulence Flows
Aerospace Systems Directorate, RQ/Aerospace Structures, Aerodynamics, and Flight Controls
||Wright-Patterson AFB, OH 454337542
|Rizzetta, Donald P.
Research opportunities exist to examine complex flow situations, employing direct numerical simulation and large-eddy simulation (LES) in order to represent turbulent structures. Problems are considered which have both fundamental scientific and practical significance. Efforts have focused on developing high-order numerical procedures for solution of the Navier-Stokes equations, employing an implicit LES approach. Previous applications include the simulation of supersonic compression-ramp flows with shock waves, acoustic suppression of aircraft weapons bay cavities using flow control, and investigation of transitional flow past highly loaded low-pressure turbine blades with active flow control. The use of plasma-based flow control strategies is an ongoing effort, and recent simulations have considered both transitional and fully turbulent situations. Investigations have explored use of plasma-based control for a low-Reynolds number airfoil in both steady flow, and undergoing a combined pitching and plunging motion. We also are interested in applying the Reynolds-averaged Navier-Stokes (RANS) approach for practical computations. For this purpose, two-equation models and Reynolds stress formulations have been considered. In addition, the use of unsteady RANS and hybrid RANS/LES models is being developed.
Turbulent flows; High-order numerical methods; Direct numerical simulation; Large-eddy simulation; Subgrid-stress models; Turbulence modeling; Detached-eddy simulation; Plasma-based flow control;
Open to U.S. citizens
Open to Postdoctoral and Senior applicants