The Aerodynamic Performance of Several Flow Control Devices for Internal Flow Systems.

Abstract

An experimental research and development program was undertaken to develop and document new flow-control devices for use in the major modifications to the 40- by 80-Foot Wind Tunnel at Ames Research Center. These devices, which are applicable to other facilities as well, included grid-type and quasi-two-dimensional flow straighteners, louver panels for valving, and turning-vane cascades with net turning angles from 0 deg to 90 deg. The tests were conducted at model scale over a Reynolds number range from 200,000 to 1,700,000, based on chord. The results showed quantitatively the performance benefits of faired, low-blockage, smooth-surface straightener systems, and the advantages of curved turning-vanes with hinge-line gaps sealed and a preferred chord-to-gap ratio between 2,5 and 3.0 for 45 deg or 90 deg turns. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1982
Accession Number
ADA123952

Entities

People

  • Brian M. Wettlaufer
  • Kenneth W. Mort
  • William T. Eckert

Organizations

  • National Aeronautics and Space Administration

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Army Aviation
  • Boundary Layer
  • Dynamic Pressure
  • Flow
  • Geometry
  • Hypervelocity Flow
  • Leading Edges
  • Measurement
  • Pressure Distribution
  • Pressure Measurement
  • Reynolds Number
  • Roughness
  • Static Pressure
  • Surface Properties
  • Surface Roughness
  • Two Dimensional
  • Wind Tunnels

Readers

  • Aerodynamics/Aeronautics.
  • Combustion and Flow Dynamics.
  • Fluid Mechanics and Fluid Dynamics.