Method for Calculating Downwash Field Due to Lifting Surfaces at Subsonic and Supersonic Speeds

Abstract

A method utilizing source singularities is presented for obtaining the linearized downwash field due to lifting wings of infinitesimal thickness at subsonic and supersonic speeds. The distribution function for the source singularities is specified by the loading on the wing. The method is applied to derive generalized formulas for the downwash field due to uniformly loaded swept and rectangular wings at subsonic and supersonic speeds. The utilization of these formulas to obtain the downwash due to wings of arbitrary loading is indicated. An example of the procedure is given in which specific formulas are derived for the downwash field due to a rectangular wing at supersonic speeds for a uniform loading and for a linear chordwise variation in loading.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1951
Accession Number
ADA382012

Entities

People

  • Sidney M. Harmon

Organizations

  • National Aeronautics and Space Administration

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Cartesian Coordinates
  • Conical Wings
  • Coordinate Systems
  • Differential Equations
  • Discontinuities
  • Distribution Functions
  • Downwash
  • Equations
  • Flow
  • Flow Fields
  • Integrals
  • Leading Edges
  • Lifting Surfaces
  • Mach Number
  • Surfaces
  • Swept Wings
  • Trailing Edges

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.
  • Solar Photovoltaics and Thermoelectric Devices.
  • Structural Dynamics.

Technology Areas

  • Hypersonics