Computational Investigation of Circulation Control Turbulence Modeling

Abstract

A computational study of the turbulence model parameters and the effect on the flow field of a circulation control airfoil was conducted. A Beam- Warming algorithm with a modified Baldwin-Lomax turbulence model was used to solve the Navier-Stokes equations. A comparison between the effects of the Bradshaw constant on the flow field about the cylinder and the flow field about an airfoil were to be made. The lack of a steady 'converged' solution for the cylinder precluded the analysis of the flow field about a cylinder. For the airfoil, the separation point moves rearward and an enhanced vortex pattern is developed as the Bradshaw constant is increased. Once a high enough value is reached, the curvature correction has minimal effect. The results obtained indicate that a better turbulence model must be employed before CFD can be used to accurately predict the flow around a circulation control airfoil.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1990
Accession Number
ADA230440

Entities

People

  • T. B. Scruggs

Organizations

  • Air Force Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Space

DTIC Thesaurus Topics

  • Boundary Layer
  • Computational Fluid Dynamics
  • Computational Science
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Geometry
  • Mathematical Models
  • Mechanical Properties
  • Mechanics
  • Physics Laboratories
  • Prandtl Number
  • Reynolds Number
  • Short Takeoff Aircraft
  • Stagnation Point
  • Turbulent Flow
  • Viscous Flow

Readers

  • Combustion and Flow Dynamics.
  • Computational Fluid Dynamics (CFD)
  • Control Systems Engineering.