Header menu link for other important links
X
Precursors to self-sustained oscillations in aeroacoustic systems
Published in Multi-Science Publishing Co. Ltd
2016
Volume: 15
   
Issue: 3
Pages: 312 - 323
Abstract
In this study, we attempt to provide a repertoire of measures to forewarn the onset of impending flow-induced mechanical oscillations via online health monitoring. To illustrate the principles, the flow of air through a pipe terminated by a circular orifice plate is investigated at various flow velocities using a suitably placed pressure transducer. It is observed that the regimes corresponding to the production of a tone is presaged by operating conditions that display temporarily intermittent bursts of periodic pressure oscillations that emerge from a background of loweramplitude aperiodic fluctuations. The various model-free measures prescribed in this paper serve as efficient precursors by characterizing these intermittent states, which can potentially arise in aeroacoustic systems when the flow is highly unsteady or turbulent. © The Author(s) 2016 Reprints and permissions.
About the journal
JournalInternational Journal of Aeroacoustics
PublisherMulti-Science Publishing Co. Ltd
ISSN1475472X
Open AccessNo
Concepts (10)
  •  related image
    Dynamics
  •  related image
    Aeroacoutics
  •  related image
    CIRCULAR ORIFICES
  •  related image
    Mechanical oscillations
  •  related image
    ON-LINE HEALTH MONITORING
  •  related image
    Operating condition
  •  related image
    Precursors
  •  related image
    PRESSURE OSCILLATION
  •  related image
    SELF-SUSTAINED OSCILLATIONS
  •  related image
    Aeroacoustics