Computation of viscous transonic flows with shocks

Chakrabartty, SK and Dhanalakshmi, K (1994) Computation of viscous transonic flows with shocks. Technical Report. National Aerospace Laboratories, Bangalore, India.

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    Abstract

    Two dimensional Reynolds averaged Navier-Stokes equations for compressible flows with algebraic turbulence models have been solved numerically using a vertex based finite volume space discretization with an explicit,five-stage Runge-Kutta tune-stepping scheme for time integration.13; Different acceleration techniques. such as local time stepping, implicit residual averaging, enthalpy damping and grid sequencing have been used along with a-blended second and fourth order artificial dissipation for mobility. The code can accept any type of grid topology and computation using multi-blocks can be performed. Transonic flows past RAE-2822. NACA-0012 and CAST-7 aerofoils with shock induced separation have been computed with four different models in separated region and13; the results are compared with c experiments- For attached transonic flows, RAE-5225 and Korn aerofoils have been analysed and compared with experimental results. In the case of attached flows the comparisons are very good where as for separated flows the computations show good skin-friction comparison but predict stronger shocks with position downstream of that observed in experiments.

    Item Type: Proj.Doc/Technical Report (Technical Report)
    Uncontrolled Keywords: Navier-stokes equations;Compressible flows;Shoks;Turbulence models;Flow separation
    Subjects: ENGINEERING > Fluid Mechanics and Thermodynamics
    Division/Department: Computational and Theoretical Fluid Dynamics Division, Computational and Theoretical Fluid Dynamics Division
    Depositing User: Mr. N A
    Date Deposited: 28 Jun 2006
    Last Modified: 24 May 2010 09:42
    URI: http://nal-ir.nal.res.in/id/eprint/1542

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