Accession Number : ADA311398

Title :   Development of LES Methodology for the Analysis of High - Reynolds Number 2-D and 3-D Dynamic Stall Phenomenon.

Descriptive Note : Annual rept. Jun 94-Jun 95,

Corporate Author : CINCINNATI UNIV OH DEPT OF AEROSPACE ENGINEERING

Personal Author(s) : Ghia, K. N. ; Ghia, U.

PDF Url : ADA311398

Report Date : JUN 1996

Pagination or Media Count : 159

Abstract : The ultimate objective of this project was to analyze forced unsteady separated flows, through numerical simulation of high-Reynolds number flows. The velocity-vorticity form of the Navier-Stokes equations were to be solved using the Large-Eddy Simulation (LES) or the coarse-grid Direct Numerical Simulation (DNS) approaches. In the first year of this project, an effort was initiated and reported to develop LES technique for forced unsteady separated flows using (m-V) formulation. Although an effort, which was spearheaded to obtain 3-D simulation of (m-V) formulation, required additional theoretical work due to an incomplete boundary condition at the surface for vorticity, the corresponding 2-D results were obtained using a backstep duct geometry and presented at the 14th International Conference on Numerical Methods in July 1994. This effort was carried out in the background, while new projects have been initiated.

Descriptors :   *AERODYNAMIC STABILITY, *EDDIES(FLUID MECHANICS), *UNSTEADY FLOW, *BOUNDARY LAYER TRANSITION, PRESSURE GRADIENTS, MATHEMATICAL MODELS, COMPUTERIZED SIMULATION, TIME DEPENDENCE, ACCURACY, TURBULENCE, TURBULENT BOUNDARY LAYER, VORTICES, COMPUTATIONAL FLUID DYNAMICS, FLOW FIELDS, STALLING, HYDRODYNAMIC CODES, NONLINEAR ANALYSIS, MACH NUMBER, TWO DIMENSIONAL FLOW, NAVIER STOKES EQUATIONS, FREE STREAM, FLOW SEPARATION, CHANNEL FLOW, REYNOLDS NUMBER, INCOMPRESSIBLE FLOW, FOURIER ANALYSIS, SHEAR FLOW, COUETTE FLOW, THREE DIMENSIONAL FLOW.

Subject Categories : Aerodynamics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE