Active control of flow-induced acoustic resonance through surface perturbation

Zhenbo Lu, Li Cheng, Dunant Halim

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

Abstract

Flow-induced acoustic resonance inside downstream cavities was experimentally investigated. A controllable motion was imposed on the surface of an upstream vortex generator using embedded piezoceramic actuators. Experiments were conducted by using both open-loop and closed-loop control. Open-loop tests show that there was an optimum control frequency and control voltage which led to a significant reduction in the strength of the flow-induced acoustic resonance. This was directly resulted not only from an impairment of the vortex shedding strength, but also from a shift in the shedding frequency created by the control action. Due to the practical limitation of the actuators, closed-loop control based on the downsampled feedback signals was implemented and tested. A downsampling procedure for reconstructing the feedback signals was investigated. Performance of the closed-loop control was then assessed. Analyses were carried out to reveal the effects of the feedback gain and phase delay on the control performance.
Original languageEnglish
Title of host publication39th International Congress on Noise Control Engineering 2010, INTER-NOISE 2010
Pages4678-4687
Number of pages10
Volume6
Publication statusPublished - 1 Dec 2010
Event39th International Congress on Noise Control Engineering 2010, INTER-NOISE 2010 - Lisbon, Portugal
Duration: 13 Jun 201016 Jun 2010

Conference

Conference39th International Congress on Noise Control Engineering 2010, INTER-NOISE 2010
CountryPortugal
CityLisbon
Period13/06/1016/06/10

Keywords

  • Acoustic resonance
  • Closed-loop control
  • Downsampling
  • Flow-induced
  • Open-loop control
  • Surface perturbation
  • Vortex

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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