Application of a Slotted Airfoil for UH-60A Helicopter Performance

Abstract

Recently developed forward slotted airfoils were applied to a UH-60A helicopter, and the performance has been estimated. Baseline SC1095 and SC1094 R8 airfoil characteristics were modified based on CFD calculations of an A3c slotted airfoil to incorporate aerodynamic characteristics of a high-lifting airfoil. The slotted airfoil increases maximum thrust of the UH-60A helicopter by up to 25%, but a significant penalty is observed at CT/sigma less than 0.11. This penalty results from higher drag than the baseline airfoil at low angles of attack. A drag reduction at high Mach numbers is necessary to fully exploit the airfoil capability in the rotorcraft application. Preliminary comparison of the slotted airfoil with the wide chord blade shows that the slotted airfoil has limited advantages over the wide chord blade.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2002
Accession Number
ADA480499

Entities

People

  • Hyeonsoo Yeo
  • Joon W. Lim

Organizations

  • National Aeronautics and Space Administration

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustics
  • Aerodynamic Characteristics
  • Blade Tips
  • Boundary Layer
  • Computational Fluid Dynamics
  • Drag Reduction
  • Dynamic Pressure
  • Flight Speeds
  • Fluid Dynamics
  • Helicopters
  • High Lift
  • Mach Number
  • Maneuvers
  • Rotary Wing Aircraft
  • Static Pressure
  • Test And Evaluation
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Aerospace Engineering