The effect of flow on semi active control of duct noise with a Helmholtz resonator

Xiaofeng Shi, Cheuk Ming Mak, Jun Yang

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

Side-branch Helmholtz resonators are widely used in duct tonal noise control and the developing semi active control enables the classical control method works effectively under changing environments. The duct system is always accompanied with flow for air exchange or heat transfer. However, the flow has a significant impact on the sound absorption performance of the resonator. The main purpose of this paper is to investigate the effect of flow on the semi active Helmholtz resonator for duct noise control. The discontinuity condition at the joint due to a low Mach number flow is analytically formulated according to the conservation of the momentum and mass of air flow. The discontinuity function is used for deriving the controller transfer function. The proposed transfer function optimally tunes the termination impedance of Helmholtz resonator to reach a broadband noise control.
Original languageEnglish
Title of host publication40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011
Pages2609-2613
Number of pages5
Volume3
Publication statusPublished - 1 Dec 2011
Event40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011 - Osaka, Japan
Duration: 4 Sep 20117 Sep 2011

Conference

Conference40th International Congress and Exposition on Noise Control Engineering 2011, INTER-NOISE 2011
Country/TerritoryJapan
CityOsaka
Period4/09/117/09/11

Keywords

  • Flow
  • Helmholtz resonator
  • Semi active control

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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