AN EXPLORATORY INVESTIGATION INTO THE DEFLECTION OF THICK JETS BY THE COANDA EFFECT

Abstract

Measurements have been made of the maximum deflection from the Coanda effect of a plane jet by a deflecting surface comprising a circular drum whose diameter was four times the jet nozzle width and which had a small flap attached to it. It was shown that the deflection of this comparatively thick jet is dependent on the jet pressure ratio and only quite small deflections can apparently be obtained for pressure ratios greater than 2. A few tests with a jet of slightly reduced thickness showed that although larger deflections were obtained at low pressures, only small deflections were again possible at pressure ratios greater than 2. Finally, some attempts at boundary layer control with spanwise auxiliary blowing slots on the deflecting surface indicated that some increase in deflection angles may thereby be achieved.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1965
Accession Number
AD0476094

Entities

People

  • L. J. S. Bradbury
  • M. N. Wood

Organizations

  • Royal Aircraft Establishment

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Air Supplies
  • Barometric Pressure
  • Boundary Layer
  • Boundary Layer Control
  • Coanda Effect
  • Equations
  • Flow
  • Flow Separation
  • Fluid Dynamics
  • Geometry
  • Inviscid Flow
  • Measurement
  • Pressure Distribution
  • Pressure Gradients
  • Reynolds Number
  • Static Pressure
  • Turbulent Mixing

Fields of Study

  • Physics

Readers

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