A Wall-Flow-Direction Probe for Use in Separating and Reattaching Flows.

Abstract

The measurement of the exceedingly unsteady behavior of nominally two-dimensional, turbulent flows in regions of separation and reattachment is facilitated by the development of a new instrument; the wall-flow-direction probe which determines the instantaneous flow direction (upstream or downstream) in a thin layer of fluid very close to the wall. The probe was tested in low-speed, unsteady, separating and reattaching air flows. It appears to offer considerably more accuracy than other methods for the determination of the time mean separation and reattachment points. In addition, the probe and its control circuits are relatively inexpensive and easy to construct. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1978
Accession Number
ADA061901

Entities

People

  • Albert H. Jeans
  • Jalal Ashjaee
  • James P. Johnston
  • John K. Eaton

Organizations

  • Purdue University

Tags

Communities of Interest

  • Energy and Power Technologies
  • Sensors

DTIC Thesaurus Topics

  • Abstracts
  • Accuracy
  • Air Flow
  • Diffusers
  • Downstream Flow
  • Flow
  • Flow Visualization
  • Instrumentation
  • Measurement
  • Measuring Instruments
  • Mechanical Engineering
  • Military Research
  • Power Supplies
  • Turbulent Flow
  • Two Dimensional
  • Unsteady Flow
  • Velocimeters

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.
  • Fluid Mechanics and Fluid Dynamics.