Unsteady Transonic Flow Past Airfoils in Rigid Body Motion.

Abstract

With the aim of developing a fast and accurate computer code for predicting the aerodynamic forces needed for a flutter analysis we review some basic concepts in computational transonics. The unsteady transonic flow past airfoils in rigid body motion is adequately described by the potential flow equation as long as the boundary layer remains attached. The two dimensional unsteady transonic potential flow equation in quasilinear form with first order radiation boundary conditions is solved by an alternating direction implicit scheme in an airfoil attached sheared parabolic coordinate system. Numerical experiments show that the scheme is very stable and is able to resolve the highly nonlinear transonic effects for flutter analysis within the context of an inviscid theory. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1981
Accession Number
ADA097142

Entities

People

  • I-chung Chang

Organizations

  • New York University

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes
  • Sensors
  • Space
  • Weapons Technologies

DTIC Thesaurus Topics

  • Aircrafts
  • Boundary Layer
  • Computational Fluid Dynamics
  • Computational Science
  • Coordinate Systems
  • Difference Equations
  • Differential Equations
  • Euler Equations
  • Fluid Dynamics
  • Fluid Flow
  • Hydrodynamics
  • Jet Propulsion
  • Navier Stokes Equations
  • Partial Differential Equations
  • Physics Laboratories
  • Two Dimensional
  • Viscous Flow

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Computational Fluid Dynamics (CFD)
  • Plasma Physics / Magnetohydrodynamics