AN ANALYSIS OF THE RESULTS OF WIND TUNNEL TESTS MADE AT THE UNIVERSITY OF WICHITA ON CIRCULAR ANNULAR JET GROUND EFFECT MACHINE MODELS,

Abstract

The tests conducted on circular GEM models at the University of Wichita in 1960 and 1961 for the Office of Naval Research are the most comprehen sive source of wind tunnel data on ground effect machines now available. A wide range of jet thicknesses and jet angles were tested over a great altitude range. Jet pressures and wind tunnel speeds were varied and measurements were made of lift, drag, pitching mvment and jet mass flow for a number of values of the angle of in cidence between model and ground board. Pressure distributions were also measured in detail but this data has not, in general, been reduced. This report analyzes the zero incidence case in detail. It is shown that the results are very consistent and that the effect of forward speed and jet pressure ratio can be eliminated by the use of a forward speed parameter. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1963
Accession Number
AD0416048

Entities

People

  • Norman K. Walker
  • Robert J. Neal

Tags

DTIC Thesaurus Topics

  • Altitude
  • Flow
  • Ground Effect
  • Ground Effect Machines
  • Mass
  • Mass Flow
  • Measurement
  • Military Research
  • Physical Properties
  • Pressure Distribution
  • Universities
  • Wind Tunnel Tests
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Aerodynamics/Aeronautics.