Nonlinear Helicopter Rotor Lifting Surface Theory. Part I

Abstract

A numerical method is developed based on potential flow nonlinear lifting surface theory for predicting the surface velocities and pressures on a rotor blade of an arbitrary helicopter rotor system which is executing a constant rotational and constant axial translational motion including, specifically, the hover flight mode. The formulation of the problem is exact in the sense that the normal surface boundary condition is satisfied on the surface of the rotor blade. The problem is governed by a Fredholm integral equation of the first kind which relates a singular velocity doublet potential surface distribution applied on the rotor blades and wakes to the normal relative velocity on the rotor blade surface. The wake model is assumed to be of a prescribed shape.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1973
Accession Number
AD0781885

Entities

People

  • Hsi F. Chou
  • Jerome B. Fanucci
  • Thomas A. Csencsitz

Organizations

  • West Virginia University

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Cartesian Coordinates
  • Case Studies
  • Computer Programs
  • Computers
  • Coordinate Systems
  • Core Storage
  • Flow Fields
  • Flow Visualization
  • Fluid Flow
  • Free Stream
  • Integral Equations
  • Lifting Bodies
  • Lifting Surfaces
  • Short Takeoff Aircraft
  • Three Dimensional
  • Viscous Flow
  • West Virginia

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Calculus or Mathematical Analysis