Three-Dimensional Flow Calculation Based on Equivalence Rule.

Abstract

Transonic flows around three-dimensional configurations are calculated based on the artificial compressibility method. The transonic nonlinear mixed-type equation is treated as if it were elliptic, and the artificial viscosity is added implicitly through modifying the density. Thus, standard discretization techniques and standard iterative procedures are applicable. The output of the full three-dimensional code are compared to the results of numerical implementation of two asymptotic theories; transonic equivalence rule and transonic lifting line. While the analytical asymptotic theories are limited to low or high aspect ratio configurations, it is found that the numerical algorithms based on these concepts can be employed efficiently in a wider range than the range where the asymptotic theories are strictly valid.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1979
Accession Number
ADA085245

Entities

People

  • Mohamed Hafez

Tags

DTIC Thesaurus Topics

  • Aspect Ratio
  • Contract Administration
  • Contracts
  • Cross Flow
  • Flow
  • Flow Fields
  • Fluid Dynamics
  • Geometry
  • Information Science
  • Leading Edges
  • Military Research
  • Standards
  • Three Dimensional
  • Three Dimensional Flow
  • Transonic Flow
  • Two Dimensional

Fields of Study

  • Physics

Readers

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