PROBLEM OF THE UNSTEADY MOTION OF A WING AT VARIABLE DISTANCES FROM A GROUND-PLANE SURFACE.

Abstract

An examination is made of the problem of determining the motion of a wing flying at variable distances from a ground-plane surface. Considered in succession are the two-and three-dimensional problems for a wing near such a surface in an ideal incompressible fluid at a given horizontal velocity and for a certain vertical velocity in a spatially fixed coordinate system and, as well, for a coordinate system linked to the wing. It is concluded that the ground has a considerable effect on the unsteady characteristics of the wing during takeoff and landing, resulting in an appreciable variation of the lift and of the stability characteristics. (Author)

Document Details

Document Type
Technical Report
Publication Date
Sep 18, 1969
Accession Number
AD0697822

Entities

People

  • A. N. Panchenkov

Organizations

  • Johns Hopkins University Applied Physics Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Coordinate Systems
  • Geometry
  • Physical Properties
  • Three Dimensional

Fields of Study

  • Mathematics
  • Physics

Readers

  • Aerospace logistics and air mobility.
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)