Incorporation of Vortex Line and Vortex Ring Hover Wake Models into a Comprehensive Rotorcraft Analysis Code

Abstract

The incorporation of simplified hover wake models into the comprehensive rotorcraft analysis code C A M R A D is described and examples are given on their use. The axisym metric models, in which vortices are represented by either straight lines or rings, are a more generalized form of the free wake models of R.T. Miller at MIT, with the wake geometry also able to be prescribed. Incorporation has allowed access to the tabular representation in C A M R A D of airfoil section characteristics as functions of angle attack and Mach number, and has broadened the range of rotor wake models in the code to include a free wake hover model that does not have the convergence problems of the existing free wake model when used for hover. Keywords: Helicopter wakes; Hovering; Vortices; Helicopter rotor aerodynamics; CAMRAD mathematical model; Australia.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1989
Accession Number
ADA208036

Entities

People

  • K. R. Reddy
  • N. E. Gilbert
  • R. Toffoletto
  • Steven C. Hill

Tags

DTIC Thesaurus Topics

  • Air Force
  • Aircraft Equipment
  • Aircrafts
  • Airframes
  • Department Of Defense
  • Engineering
  • Geometry
  • Helicopter Rotors
  • Helicopters
  • Lepidoptera
  • Load Distribution
  • Mach Number
  • Mechanics
  • Operating Systems
  • Radial Velocity
  • Rotary Wing Aircraft
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Fluid Mechanics and Fluid Dynamics.
  • Software Engineering.