Direct Numerical Simulation of Flow Transition in Compressible Boundary Layer Around Airfoils.

Abstract

The three dimensional development of flow transition in both subsonic and supersonic Joukowsky airfoil boundary layers are studied by direct numerical simulation (DNS). The numerical simulation is performed by a spatial approach. A full compressible Navier Stokes system in curvilinear coordinates is employed so that we can simulate the transition around general geometric configurations. The numerical results agree very well with the linear stability theory (LST) at the linear growth stage for both primary and second modes in the flat plate boundary layers. The whole process of controlled flow transition induced by blowing/suction around airfoils is simulated by directly solving the N-S system with Reynolds number around one million. Some differences are found in comparison to the incompressible counterpart, and some new phenomena for the transition around airfoils are observed which at least qualitatively agree with physics.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1997
Accession Number
ADA322271

Entities

People

  • Chaoqun Liu
  • Guohua Xiong
  • Wei Zhao
  • Zhining Liu

Organizations

  • Louisiana Tech University

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Boundaries
  • Boundary Layer
  • Boundary Layer Flow
  • Boundary Layer Transition
  • Computational Science
  • Equations
  • Fluid Dynamics
  • Geometry
  • Layers
  • Mach Number
  • Mathematics
  • Pressure Gradients
  • Reynolds Number
  • Simulations
  • Three Dimensional
  • Turbulent Flow
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Computational Fluid Dynamics (CFD)
  • Fluid Mechanics and Fluid Dynamics.

Technology Areas

  • Hypersonics
  • Hypersonics - Hypersonic Boundary Layers
  • Hypersonics - Hypersonic Flow