Calculation of Tilt Rotor Aeroacoustic Model (TRAM DNW) Performance, Airloads, and Structural Loads

Abstract

Comparisons of measured and calculated aeromechanics behavior of a tiltrotor model are presented, with an emphasis on performance and structural loads. The recent test of the Tilt Rotor Aeroacoustic Model (TRAM) with a single, 1/4-scale V-22 rotor in the German-Dutch Wind Tunnel (DNW) provides an extensive set of aeroacoustic, performance, and structural loads data. The calculations were performed using the rotorcraft comprehensive analysis CAMRAD II. The comparison of measurements and calculations includes helicopter mode operation (performance, airloads, and blade structural loads), hover performance, and airplane mode performance. The correlation establishes the level of predictive capability achievable with current technology; identifies the limitations of the current aerodynamic, wake, and structural models of tiltrotors; and leads to recommendations for research to extend tiltrotor aeromechanics analysis capability.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 2000
Accession Number
ADA480704

Entities

People

  • Wayne R. Johnson

Organizations

  • National Aeronautics and Space Administration

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aircrafts
  • Airframes
  • Bending Moments
  • Blade Tips
  • Boundary Layer
  • Center Of Gravity
  • Convection
  • Helicopter Rotors
  • Mach Number
  • Measurement
  • Momentum
  • Pressure Distribution
  • Pressure Measurement
  • Rotary Wing Aircraft
  • Structural Loads
  • Tilt Rotor Aircraft
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Aerospace Engineering