EFFECTS OF NONEQUILIBRIUM ON THE HYPERSONIC LAMINAR BOUNDARY LAYER,

Abstract

An approxiate method is formulated for the determination of the non-equilibrium compressible laminar boundary layer, both with and without the restriction of vibrational equilibrium. The method involves solution of the rate equations for species production and vibrational relaxation along effective particle paths determined from mass continuity considerations. The velocity and enthalpy time histories along these paths are then specified from the appropriate locally simialr equilibrium or frozen boundary layer analysis. Application of the method is illustrated for the hypersonic laminar boundary layer along a sharp cone. Results are compared with more exact numerical solutions of the nonequilibrium boundary layer equations, and the limitations of the approximate method are indicated. Finally, the technique is used to determine the effects of altitude and cone angle on the nonequilibrium boundary layer, together with the influence of variations in the chemical rate constants and vibrational relaxation models. The application of binary scaling is discussed. (Author)

Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1963
Accession Number
AD0429808

Entities

People

  • A. D. Wood
  • F. Berner
  • J. D. Teare
  • P. Derienzo

Tags

DTIC Thesaurus Topics

  • Altitude
  • Arrhenius Equation
  • Boundaries
  • Boundary Layer
  • Continuity
  • Enthalpy
  • Equations
  • Laminar Boundary Layer
  • Layers
  • Mathematics
  • Particles
  • Production
  • Vibrational Relaxation

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.

Technology Areas

  • Hypersonics
  • Hypersonics - Hypersonic Boundary Layers
  • Hypersonics - Hypersonic Flight