USE OF VORTICES IN CALCULATION OF BOTTOM PRESSURES OF ANNULAR JET GROUND EFFECT MACHINES.

Abstract

An engineering procedure is suggested for estimating the pressure distribution on the bottom of a stationary ground effect machine of the annular-jet-type. The flow field under the machine was assumed to consist of a core of more or less uniform vorticity separated from the cavity boundaries by a viscous layer. For estimation of pressure on the bottom of the vehicle the core could be approximated under some circumstances by a simple distribution of vortices halfway between the vehicle and the ground; empirical relations for the placement and strength of these vortices were based upon available model test data. (Author)

Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1961
Accession Number
AD0679360

Entities

People

  • R. J. Magnus

Organizations

  • General Dynamics

Tags

DTIC Thesaurus Topics

  • Boundaries
  • Engineering
  • Flow
  • Flow Fields
  • Ground Effect
  • Ground Effect Machines
  • Model Tests
  • Pressure Distribution
  • Stationary
  • Vehicles

Readers

  • Aerospace Test and Evaluation
  • Fluid Mechanics and Fluid Dynamics.
  • Statistical inference.