The Effect of Pressure Gradients on Transition Zone Length in Hypersonic Boundary Layers.

Abstract

Boundary layer transition was measured in zero, favorable, and adverse pressure gradients at Mach 8 using heat transfer. Models consisted of 7 degrees half angle forecones 0.4826 m long, followed by flared or ogive aft bodies 0.5334 m long. The flares and ogives produced constant pressure gradients. For the cases examined, favorable pressure gradients delay transition and adverse pressure gradients promote transition, but transition zone lengths are shorter in favorable pressure gradient. Results of the effect of adverse pressure gradient on transition zone lengths were inconclusive.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1993
Accession Number
ADA288483

Entities

People

  • Roger L. Kimmel

Organizations

  • Wright Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes
  • Weapons Technologies

DTIC Thesaurus Topics

  • Boundary Layer
  • Boundary Layer Flow
  • Boundary Layer Transition
  • Fluid Dynamics
  • Geometry
  • Heat Transfer
  • Laminar Boundary Layer
  • Mach Number
  • Measurement
  • Pressure Distribution
  • Pressure Gradients
  • Reynolds Number
  • Static Pressure
  • Turbulent Boundary Layer
  • Turbulent Flow
  • Turbulent Mixing
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.

Technology Areas

  • Hypersonics
  • Hypersonics - Hypersonic Boundary Layers