Separation and Unsteady Vortex Shedding from Leading Edge Surface Roughness

Abstract

The properties of isolated and distributed surface roughness, as well as their effects on transition, separation and overall airfoil performance, are reviewed for steady and unsteady flows. Ongoing research aimed at developing Direct Numerical Simulation tools for the study of leading edge roughness is discussed, and representative calculations are presented for steady and unsteady flows past two and three-dimensional isolated and distributed roughness on airfoil leading edges. Preliminary two-dimensional computations of the suppression of flow separation using dynamic surface roughness are also presented.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 2004
Accession Number
ADA442193

Entities

People

  • A. P. Rothmayer
  • B. D. Matheis
  • W. W. Huebsch

Organizations

  • Iowa State University

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Boundary Layer
  • Computations
  • Flow
  • Flow Separation
  • Fluid Dynamics
  • Geometric Forms
  • Geometry
  • Leading Edges
  • Pressure Gradients
  • Reynolds Number
  • Simulations
  • Surface Roughness
  • Three Dimensional
  • Turbulent Mixing
  • Two Dimensional
  • Unsteady Flow

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.