Free Shear Layers, Base Pressure and Bluff-Body Drag

Abstract

Incompressible, non-vortex-shedding bluff-body Flows and supersonic base-pressure flows are discussed from a unified viewpoint in which the aspect ratio of the near wake is determined from the balance of shear-stress and pressure forces on the near-wake boundary. The base pressure and drag are then determined from free-streamline theory. The analysis is incomplete, for want of sufficient information about conditions in reattaching supersonic turbulent shear layers.

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Document Details

Document Type
Technical Report
Publication Date
Dec 10, 1993
Accession Number
ADA286316

Entities

People

  • A. Roshko

Organizations

  • California Institute of Technology

Tags

Communities of Interest

  • C4I
  • Space

DTIC Thesaurus Topics

  • Aspect Ratio
  • Base Pressure
  • Boundary Layer
  • Computational Fluid Dynamics
  • Flow
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Hydrodynamics
  • Incompressible Flow
  • Mechanical Properties
  • Mechanics
  • Pressure Distribution
  • Reynolds Number
  • Shear Stresses
  • Turbulent Mixing
  • Vortex Shedding

Fields of Study

  • Physics

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Theoretical Analysis.

Technology Areas

  • Hypersonics
  • Hypersonics - Hypersonic Boundary Layers