Large-Scale Separation and Wake Closure/Reattachment - The Cascade Problem,

Abstract

This work aims at application in both internal and external flows. An analytical and computational study is described which attempts ultimately to uncover the nature of the flow structure surrounding the wake closure region of a long recirculatory eddy following separation off an isolated aerodynamic element. This problem area forms a critical element in the development of a formally rational model for a massive separation eddy at large Reynolds number. An approach is developed here for addressing the external aerodynamic problem through a family of internal, cascade flow, solutions with increasing gap spacing. Each element of this family is formally correct, thus providing a basis for systematic study of the desired limit case of an infinite gap spacing. The study is in two parts. Part I presents the structure for finite gap spacing and the corresponding computational results. Part II discusses the possible flow structures emerging for widely spaced cascades and their connection with, and implications for, the external aerodynamic flow. (Author)

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1983
Accession Number
ADA131185

Entities

People

  • F. T. Smith

Organizations

  • United Technologies Corporation

Tags

Communities of Interest

  • C4I
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Boundary Layer
  • Computational Fluid Dynamics
  • Computational Science
  • Differential Equations
  • Equations
  • Fluid Dynamics
  • Fluid Flow
  • Fluid Mechanics
  • Mechanics
  • Navier Stokes Equations
  • Plastic Explosives
  • Pressure Gradients
  • Reynolds Number
  • Standards
  • Turbulent Mixing
  • Two Dimensional
  • Wind Tunnels

Readers

  • Fluid Mechanics and Fluid Dynamics.
  • Systems Analysis and Design

Technology Areas

  • Space