Numerical computation of turbulent incompressible flow around aerofoils

Majumdar, Sekhar and Vengadesan, S (1992) Numerical computation of turbulent incompressible flow around aerofoils. Technical Report. National Aeronautical Laboratory, Bangalore, India.

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Abstract

The present study aims at calculation of 2D turbulent13; flow around aerofoil and its wake by solving the non-13; -linear coupled system of elliptic differential equations13; of motion for two-dimensional, turbulent, incompressible13; flows in Reynolds-averaged- form in general non-orthogonal13; coordinate system. The prediction procedure13; uses a standard K- f turbulence model embodied in13; a finite volume algorithm, originally developed by the13; first author at the Institute for hydromechanics, University13; Karlsruhe, Germany. The code is thoroughly modified13; to handle the boundary conditions at the cut line13; behind the aerofoil for the C-type grids used. Computations13; are carried out for NACA 0012 aerofoils at13; zero angle of attack and for a Korn-Garabadian Aerofoil13; at 5' angle of attack when asymmetric wake is developed. The prediction is validated against experimental results. Experimental validation confirms the prediction procedure to be reasonably accurate for surface pressure, skin-friction coefficient for attached boundary layer flows. In case of asymmetric wake, poor quantitative agreement between prediction and experiment may be attributed to the coarse grid, the upwind/central hybrid discretisation scheme and the inadequacy of Standard Wall Function in resolving the surface boundary layer specially at adverse pressure gradient.

Item Type: Monograph (Technical Report)
Uncontrolled Keywords: X-E turbulence model;Incompressible flow;Finite volume algorithm;Asymmetric turbulent wake;2D aerofoils
Subjects: ENGINEERING > Fluid Mechanics and Thermodynamics
Depositing User: Smt Bhagya Rekha KA
Date Deposited: 09 Aug 2006
Last Modified: 24 May 2010 04:18
URI: http://nal-ir.nal.res.in/id/eprint/2410

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