Effects of Passive Porous Walls on the First Mode of Hypersonic Boundary Layers Over a Sharp Cone

Abstract

A theoretical linear stability analysis is used to consider the effect of a porous wall on the first Mack mode of a hypersonic boundary layer on a sharp slender cone. The effect of curvature and of the attached shock are included for axisymmetric and non-axisymmetric disturbances. The flow in the hypersonic boundary layer is coupled to the flow in the porous layer by the porous wall model admittance. We considered the effect of the phase angle of the admittance of a circular pore model on the first Mack mode. We further considered the effect of two other wall models, a high porosity rectangular mesh microstructure model and a low porosity model comprising of spanwise grooves with varying thickness, on the linear and weakly nonlinear stability of the flow.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2013
Accession Number
ADA581526

Entities

People

  • Sharon O. Stephen
  • Vipin Michael

Organizations

  • University of Birmingham

Tags

Communities of Interest

  • Materials and Manufacturing Processes
  • Space

DTIC Thesaurus Topics

  • Air Force Research Laboratories
  • Axisymmetric
  • Bessel Functions
  • Boundaries
  • Boundary Layer
  • Curvature
  • Equations
  • Fluid Dynamics
  • Geometry
  • Hypersonic Flow
  • Layers
  • Mach Number
  • Microstructure
  • Physical Properties
  • Porosity
  • Reynolds Number
  • Thickness

Fields of Study

  • Physics

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Fluid Mechanics and Fluid Dynamics.
  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Hypersonics
  • Hypersonics - Hypersonic Boundary Layers