Interactional Aerodynamics of the Single-Rotor Helicopter Configuration. Volume I.

Abstract

A study has been conducted to understand the interactional aerodynamics problems occurring during the UTTAS development. Powered wind tunnel model data were organized and analyzed in the following categories of interactions: Rotor/ground; Rotor/fuselage; Rotor/fuselage/ground; Rotor/empennage; and Rotor/empennage/ground. The following related problem areas are considered: Severe lateral trim changes during transition close to the ground; The occurrence of high vibratory aerodynamic loads on the airframe surfaces; Turbulent flow on the airframe near the ground; Excessive low-frequency unsteady loads on the empennage in forward flight due to the hub/rotor wake; and Poor efficiency in tail rotor installations due to adverse fin loading.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1978
Accession Number
ADA060389

Entities

People

  • Philip F. Sheridan

Organizations

  • Boeing Rotorcraft Systems

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Actuators
  • Aerodynamic Configurations
  • Aircraft Equipment
  • Aircrafts
  • Airfoils
  • Airframes
  • Control Systems
  • Fixed Wing Aircraft
  • Flow Visualization
  • Fuselages
  • Geometry
  • Horizontal Stabilizers
  • Measurement
  • Pressure Measurement
  • Test Facilities
  • Wind Tunnel Tests
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Aerospace Engineering
  • Fluid Mechanics and Fluid Dynamics.