Investigation of the physical mechanisms of tonal sound generation by slats

Anurag Agarwal, Philip J. Morris

Research output: Chapter in Book/Report/Conference proceedingConference contribution

10 Scopus citations

Abstract

The physical mechanisms for the occurrence of high-amplitude, high-frequency tonal noise generated by the flow through the gap between the slat and the main element during aircraft approach are explored using a detailed local stability analysis of the slat wake. Based on the physical characteristics of the wake, vortex shedding frequencies are predicted for different slat deployment angles. It is proposed that the observed tonal noise is due to a whistling mechanism. When the vortex shedding frequency at the slat trailing edge matches one of the transverse resonance frequencies of the gap between the slat and the main element, an intense, tonal sound field is produced. The predictions of tones and frequencies from the proposed whistling mechanism are in good agreement with experimental measurements.

Original languageEnglish (US)
Title of host publication8th AIAA/CEAS Aeroacoustics Conference and Exhibit
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Print)9781624101199
DOIs
StatePublished - 2002
Event8th AIAA/CEAS Aeroacoustics Conference and Exhibit, 2002 - Breckenridge, CO, United States
Duration: Jun 17 2002Jun 19 2002

Publication series

Name8th AIAA/CEAS Aeroacoustics Conference and Exhibit

Other

Other8th AIAA/CEAS Aeroacoustics Conference and Exhibit, 2002
CountryUnited States
CityBreckenridge, CO
Period6/17/026/19/02

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Acoustics and Ultrasonics

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