Comparison of Full-Scale XV-15 Blade-Vortex Interaction Noise Calculations with Wind Tunnel Data

Abstract

Results from the TRAC acoustic prediction system were correlated with data from a test of an isolated full-scale XV-15 rotor in the NASA Ames 80- by 120-Foot Wind Tunnel. The airloads calculation provided by the original CAMRAD.Mod1 code in the standard TRAC system was exercised with several high resolution options, including the FPXBVI CFD code. In addition, the more recent CAMRAD II code was run in place of the original CAMRAD.Mod1. The CAMRAD II code, with a multiple trailer wake model yielding airloads at 3 degree azimuthal resolution, provided excellent correlation with measured BVI pulse amplitude, but less so for pulsewidth. There is indication that better results may be obtained with higher resolution airloads.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2002
Accession Number
ADA480674

Entities

People

  • Cahit Kitaplioglu
  • Wayne R. Johnson

Organizations

  • National Aeronautics and Space Administration

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Acoustic Fields
  • Acoustics
  • Aircraft Industry
  • Aircrafts
  • Airframes
  • Computational Fluid Dynamics
  • Experimental Data
  • Geometry
  • Helicopters
  • High Resolution
  • Pressure Distribution
  • Pulse Amplitude
  • Rotary Wing Aircraft
  • Test And Evaluation
  • Tilt Rotor Aircraft
  • Wind Tunnel Tests
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Computer Science.
  • Fluid Dynamics.