Direct Numerical Simulation for the Receptivity and the Whole Process of Transition Around Joukowsky Airfoils.

Abstract

The two- and three-dimensional development of leading-edge receptivity and transition in a 2-D Joukowsky airfoil boundary layer are investigated by direct numerical simulation (DNS) using the incompressible Navier-Stokes equations. The numerical investigation are based on the so-called spatial approach. A contravariant based governing system is derived so that we can simulate the receptivity and transition with complex geometries. The numerical results agreed very well with the experimental results for the flat plate case, and also agreed well with the result obtained by other researchers for the 2-D elliptic leading-edge receptivity case. Some new phenomena for the transition around Joukowsky airfoils were observed which at least qualitatively agree with physics.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1996
Accession Number
ADA309978

Entities

People

  • Chaoqun Liu
  • Guohua Xiong
  • Zhining Liu

Organizations

  • University of Colorado Boulder

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Base Flow
  • Boundaries
  • Boundary Layer
  • Conformal Mapping
  • Convection
  • Coordinate Systems
  • Equations
  • Flow Fields
  • Geometry
  • Layers
  • Leading Edges
  • Navier Stokes Equations
  • Pressure Gradients
  • Simulations
  • Three Dimensional
  • Transitions
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.