An Investigation of Turbulence Mechanisms in V/STOL Upwash Flow Fields.

Abstract

Results are presented of an experimental investigation of the abnormally high turbulent mixing layer growth rate characteristics found in the upwash regions of V/STOL flows in ground effect. Three dimensional experimental studies were conducted in a radial wall jet facility. Measurements included velocity components, second - third - fourth moments, and integral and microscale lengths. The upwash formed by the collision of radial wall jets contains the essential characteristics of a radial upwash while decoupling the problem caused by the impinging jets on the ground plane and the recirculation zone. Keyword: Vertical takeoff aircraft; Short takeoff aircraft; Upwash; Ground effect.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1987
Accession Number
ADA181265

Entities

People

  • Barry L. Gilbert

Organizations

  • Grumman

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Computational Fluid Dynamics
  • Databases
  • Flow
  • Flow Visualization
  • Fluid Dynamics
  • Fluid Mechanics
  • Geometry
  • Ground Effect
  • Instrumentation
  • Integrals
  • Measurement
  • Mechanics
  • Shape
  • Short Takeoff Aircraft
  • Symmetry
  • Turbulent Mixing
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Aerodynamics/Aeronautics.
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Combustion and Flow Dynamics.