The Development of a Computer Code (U2DIIF) for the Numerical Solution of Unsteady, Inviscid and Incompressible Flow Over an Airfoil.

Abstract

A numerical technique is formulated, in a computer program U2DIIF, for the solution of flow over an airfoil executing an arbitrary unsteady motion in an inviscid and incompressible medium. The technique extends the well known Panel Methods for steady flow into solving a non-linear unsteady flow problem arising from the continuous vortex shedding into the trailing wake due to the unsteady motion of the airfoil. Numerous case-runs are presented to verify U2DIIF computer code against other theoretical and/or numerical methods as well as in cases where limited experimental data are obtainable in literatures. These case-runs include airfoils undergoing a step change or a modified ramp change of angle-of-attack, airfoils executing harmonic oscillation in pitching and plunging motions and airfoils penetrating a sharp edge gust. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1987
Accession Number
ADA185033

Entities

People

  • Ngai-huat Teng

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Air Platforms
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Aerodynamics
  • Computational Fluid Dynamics
  • Computations
  • Computer Programs
  • Experimental Data
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Hydrodynamics
  • Incompressible Flow
  • Potential Flow
  • Pressure Distribution
  • Steady Flow
  • Steady State
  • Two Dimensional
  • Unsteady Flow
  • Vortex Shedding

Fields of Study

  • Physics

Readers

  • Computer Science.
  • Fluid Dynamics.
  • Fluid Mechanics and Fluid Dynamics.