Flow Field and Acoustic Measurements of a Blunt Trailing Edge

Doctoral Dissertation

Abstract

This dissertation presents experimental results regarding the phenomenon of trailing edge noise. The objective of the present research was to experimentally measure flow field and acoustic variables in order to develop an understanding of the mechanisms that generate trailing edge noise in incompressible, high Reynolds number flows. This includes the measurement of the local velocity field, the unsteady surface pressure, and the radiated sound. These data have supplied a unique database of both the turbulence and the radiated far field pressure. In addition, two-component velocity measurements were acquired using Particle Image Velocimetry (PIV) in order to spatially resolve the local velocity field. The data show velocity field realizations that were typical of wake flow containing an asymmetric periodic vortex shedding. Beamforming methods were utilized in conjunction with a pair of 40 microphone arrays to isolate trailing edge noise from unwanted tunnel noise. The measured acoustic sources show good agreement with numerical results obtained through LES.

Attributes

Attribute NameValues
URN
  • etd-04202007-133942

Author Daniel W Shannon
Advisor S. Alex Kandel
Contributor Thomas J. Mueller, Committee Member
Contributor Scott C. Morris, Committee Member
Contributor Hafiz Atassi, Committee Member
Contributor Meng Wang, Committee Member
Contributor S. Alex Kandel, Committee Chair
Degree Level Doctoral Dissertation
Degree Discipline Aerospace and Mechanical Engineering
Degree Name PhD
Defense Date
  • 2007-04-03

Submission Date 2007-04-20
Country
  • United States of America

Subject
  • Acoustic Array

  • Trailing Edge Noise

  • PIV

  • Aeroacoustics

  • Beamforming

Publisher
  • University of Notre Dame

Language
  • English

Record Visibility Public
Content License
  • All rights reserved

Departments and Units

Files

Please Note: You may encounter a delay before a download begins. Large or infrequently accessed files can take several minutes to retrieve from our archival storage system.