Finite Difference Modeling of Rotor Flows Including Wake Effects.

Abstract

This paper gives a brief consideration of rotary wing finite difference methods. The main concern is the specification of boundary conditions to properly account for the effect of the wake on the blade. Examples are given of an approach where wake effects are introduced by specifying an equivalent angle of attack. An alternate approach is also given where discrete vortices are introduced into the finite difference grid. The resulting computations of hovering and high advance-ratio cases compare well with experiment. Some consideration is also given to the modeling of low-to-moderate advance-ratio flows. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1982
Accession Number
ADA120182

Entities

People

  • A. Desopper
  • C. Tung
  • F. X. Caradonna

Organizations

  • Ames Research Center

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Boundary Layer
  • Difference Equations
  • Differential Equations
  • Equations
  • Experimental Data
  • Flow
  • Free Stream
  • Frequency
  • Geometric Forms
  • Geometry
  • Lifting Surfaces
  • Lines (Geometry)
  • Mach Number
  • Measurement
  • Pressure Distribution
  • Two Dimensional
  • United States

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Computational Fluid Dynamics (CFD)
  • Mathematical Modeling and Probability Theory.