Acoustic and Velocity Measurements in the Flow Past an Airfoil Trailing Edge

Master's Thesis

Abstract

This thesis describes the results found during a project to investigate the sources of trailing edge noise production. A flat plate airfoil was investigated for the Office of Naval Research. This document shows the results of the two parts of this project. First an experimental database used as the input for numerical acoustic modeling at Stanford University was obtained. Therefore the flow around and inside a defined control volume was investigated using hot-wire probes (single and x-wire measurements) and pressure measurements. In the second part, far field acoustic measurements and correlation measurements between x-wire probes and the micro- phones were made to investigate possible correlation between the flow physics and the far field acoustics. The control volume boundary results show that the incoming flow is of low turbulent intensity and that the wake behind the trailing edge shows an asymmetric development. Vortex Shedding could be identified separately by acoustic and hot-wire measurements at a frequency of around 220Hz. Similar frequency behavior could be identified in the correlation measurements between the x-wire probes and the microphones.

Attributes

Attribute NameValues
URN
  • etd-04022004-092958

Author Claudia Kunze
Advisor Dr. T. J. Mueller
Contributor Dr. T. J. Mueller, Committee Chair
Contributor Dr. S. Morris, Committee Member
Contributor Dr. H. M. Atassi, Committee Member
Degree Level Master's Thesis
Degree Discipline Aerospace and Mechanical Engineering
Degree Name MSAE
Defense Date
  • 2004-03-25

Submission Date 2004-04-02
Country
  • United States of America

Subject
  • trailing edge noise

  • fluid mechanics

Publisher
  • University of Notre Dame

Language
  • English

Record Visibility Public
Content License
  • All rights reserved

Departments and Units

Files

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