Transonic Small Disturbance Calculations Including Entropy Corrections,

Abstract

Murman's fully conservative mixed type finite-difference operators are first modified. A special sonic point operator with an iterative damping term is introduced which helps the convergence and does not affect the spatial conservative differences. Reliable calculations with second order supersonic schemes are obtained using two operators, the regular sonic point operator followed by a first order supersonic scheme. Also, shock point operator is shown to be equivalent to fitting a locally normal shock terminating the supersonic region. The potential calculations are then modified to account for the non-isentropic jump conditions using a simple shock fitting procedure based on Prandtl relation.

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1980
Accession Number
ADP001952

Entities

People

  • D. Lovell
  • M. Hafez

Organizations

  • National Aeronautics and Space Administration

Tags

DTIC Thesaurus Topics

  • California
  • Continents
  • Convergence
  • Geographic Regions
  • North America

Fields of Study

  • Physics

Readers

  • Combustion Dynamics and Shock Wave Physics.
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Regression Analysis.

Technology Areas

  • Hypersonics