The Dynamics of a Growing Separated Region on an Airfoil

Abstract

At present little is known of the dynamics of a separating and reattaching flowfield. This unsteady flow topic relates to a wide range of aerodynamic problems such as dynamic stall and control-surface-buzz. A theory is developed which models separation bubble dynamics. It includes a quasi-steady model for the external shear-layer, and flow of mass within the bubble at a mean reversed-flow velocity. Pressure perturbations along the bubble are modeled also. The theory is based on experimental results for an airfoil with oscillating spoiler and flap.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1975
Accession Number
ADA008773

Entities

People

  • James D. Lang

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • C4I
  • Space

DTIC Thesaurus Topics

  • Aircrafts
  • Airfoils
  • Boundary Layer
  • Computational Fluid Dynamics
  • Computational Science
  • Flow Fields
  • Fluid Dynamics
  • Fluid Mechanics
  • Hydrodynamics
  • Pressure Distribution
  • Reynolds Number
  • Short Takeoff Aircraft
  • Steady Flow
  • Three Dimensional
  • Turbulence
  • Turbulent Flow
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.