Uncommon noise signatures in a wind tunnel

Authors

  • R. Ramakrishnan Aiolos Engineering Corporation, 2150 Islington Avenue, Toronto, Ont. M9P 3V4, Canada
  • M. Rennie Aiolos Engineering Corporation, 2150 Islington Avenue, Toronto, Ont. M9P 3V4, Canada
  • S. Lau Aiolos Engineering Corporation, 2150 Islington Avenue, Toronto, Ont. M9P 3V4, Canada

Keywords:

Optimization, Speed, Temperature control, Vibrations (mechanical), Wind tunnels, Uncommon noise signatures, Wind tunnel testing

Abstract

An on-site investigation was undertaken to correct a resonant tone that was eventually traced to the main fan support structure. It was found that the trailing edge flow leaving the stator blades and impinging on the flat support vanes was the main cause of the tonal noise problem. The fan manufacturer was apprised of these findings and the support vanes were modified with additional ribs to change their natural frequencies. The intensity of the tonal noise reduced substantially and the control noise levels are within the allowable tolerance of 60 dBA at all speeds.

Additional Files

Published

2001-09-01

How to Cite

1.
Ramakrishnan R, Rennie M, Lau S. Uncommon noise signatures in a wind tunnel. Canadian Acoustics [Internet]. 2001 Sep. 1 [cited 2024 Oct. 11];29(3):96-9. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1399

Issue

Vol. 29 No. 3 (2001)

Section

Proceedings of the Acoustics Week in Canada

License

Author Licensing Addendum

This Licensing Addendum ("Addendum") is entered into between the undersigned Author(s) and Canadian Acoustics journal published by the Canadian Acoustical Association (hereinafter referred to as the "Publisher"). The Author(s) and the Publisher agree as follows:

  1. Retained Rights: The Author(s) retain(s) the following rights:

    • The right to reproduce, distribute, and publicly display the Work on the Author's personal website or the website of the Author's institution.
    • The right to use the Work in the Author's teaching activities and presentations.
    • The right to include the Work in a compilation for the Author's personal use, not for sale.

  2. Grant of License: The Author(s) grant(s) to the Publisher a worldwide exclusive license to publish, reproduce, distribute, and display the Work in Canadian Acoustics and any other formats and media deemed appropriate by the Publisher.

  3. Attribution: The Publisher agrees to include proper attribution to the Author(s) in all publications and reproductions of the Work.

  4. No Conflict: This Addendum is intended to be in harmony with, and not in conflict with, the terms and conditions of the original agreement entered into between the Author(s) and the Publisher.

  5. Copyright Clause: Copyright on articles is held by the Author(s). The corresponding Author has the right to grant on behalf of all Authors and does grant on behalf of all Authors, a worldwide exclusive license to the Publisher and its licensees in perpetuity, in all forms, formats, and media (whether known now or created in the future), including but not limited to the rights to publish, reproduce, distribute, display, store, translate, create adaptations, reprints, include within collections, and create summaries, extracts, and/or abstracts of the Contribution.