Numerical Solutions of the Unsteady Transonic Small-Disturbance Equations.

Abstract

Three problems pertinent to the numerical solution of the unsteady transonic small-disturbance equation are studied. The first problem is the numerical instabilities arising in the solution of the harmonic perturbation potential equation. Several remedies that have been tested are suggested. The second problem is the movement of unsteady shock waves in the harmonic perturbation approach. A formulation and computed example are presented. The third problem is a finite-element formulation for unsteady transonic flow. Preliminary calculations are given. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1977
Accession Number
ADA054036

Entities

People

  • E. M. Murman
  • L. C. Wellford
  • M. H. Rizk
  • M. M. Hafez

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Air Force
  • Algorithms
  • Boundary Value Problems
  • Computational Fluid Dynamics
  • Computational Science
  • Difference Equations
  • Differential Equations
  • Equations
  • Finite Element Analysis
  • Frequency
  • Helmholtz Equations
  • Leading Edges
  • Mach Number
  • Mechanics
  • Partial Differential Equations
  • Shock Waves
  • Transonic Flow

Fields of Study

  • Physics

Readers

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