Aerodynamic Characteristics of a Helicopter Rotor Airfoil as Affected by Simulated Ballistic Damage

Abstract

Tests were made in a two-dimensional insert at the University of Maryland's Glenn L. Martin subsonic wind tunnel to examine the effects of simulated ballistic damage on the aerodynamic characteristics of a UH-60A Black Hawk helicopter main rotor blade section. Tests were conducted on the undamaged blade section, and on the same section with simulated ballistic damage comprising a circular hole with a surrounding portion of the skin removed, exposing the internal honeycomb structure. The structural lift, drag and pitching moment were measured at small increments in angle of attack up through stall at Reynolds numbers of 100 and 2xl06. In addition, tests were conducted over a full 360-degree range in angle of attack for a Reynolds number of 106. The measurements were complemented by mini-tuft flow visualization on the upper wing section, particularly near the hole.... Rotor blades, Aerodynamics, Wind tunnel test, Ballistic damage

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1993
Accession Number
ADA269206

Entities

People

  • J. G. Leishman

Organizations

  • University of Maryland

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Aerodynamic Characteristics
  • Aircrafts
  • Data Acquisition
  • Dynamic Pressure
  • Flow
  • Flow Visualization
  • Fluid Dynamics
  • Geometry
  • Helicopter Rotors
  • Leading Edges
  • Low Angles
  • Measurement
  • Reynolds Number
  • Test Facilities
  • Three Dimensional
  • Two Dimensional
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Aerodynamics/Aeronautics.
  • Structural Health Monitoring of Composite Structures.