Leading Edge Vortex Flow Computations and Comparisons with DNW-HST Wind Tunnel Data

Abstract

Computations are presented for the vortical flow around a sharp-edged cropped delta wing with 65 deg leading edge sweep using a computational method based on the Reynolds-averaged Navier-Stokes equations. It is demonstrated that turbulence modelling plays a crucial role in the ability to capture the vortical structures. Standard one- and two- equation turbulence models need corrections for vortical flows in order to avoid over-prediction of the levels of turbulent viscosity inside vortex cores. In this paper two types of modifications to the two-equation k-omega turbulence model are investigated to overcome this problem. One modification consists of limiting the production of turbulent kinetic energy in the k-equation, whereas the other modification is aimed at increasing the production of dissipation in the dissipation equation (omega equation); omega represents the dissipation of turbulent kinetic energy.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2003
Accession Number
ADA418826

Entities

People

  • A. Elsenaar
  • F. J. Brandsma
  • J. C. Kok

Organizations

  • NATO Science and Technology Organization

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Boundary Layer
  • Computational Fluid Dynamics
  • Computational Science
  • Computations
  • Cross Flow
  • Delta Wings
  • Equations
  • Experimental Data
  • Flow Fields
  • Flow Visualization
  • Fluid Flow
  • Leading Edges
  • Pressure Distribution
  • Reynolds Number
  • Turbulent Mixing
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Computational Fluid Dynamics (CFD)
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Fluid Mechanics and Fluid Dynamics.