Experimental and numerical investigations of vibration due to flow through an orifice

Shravan Kottapalli, David Smeulders, Gunes Nakiboglu

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

1 Citation (Scopus)

Abstract

High precision manufacturing machines often require extremely tight tolerances in their end products. Hence vibrations induced by flow within internal components such as an orifice, can cause deviations in measurements and defects in production. These vibrations caused due to orifices are a result of large pressure drops generated during flow separation resulting in pressure waves that propagate within the system interacting with other components. In this article vibrations resulting from orifice flows are comprehensively studied through a series of experiments and numerical simulation. The experiments performed involve pressure measurements with varying orifice diameters. The pressure signals obtained from the experiment are recorded and analysed with respect to their energy distribution. The study is further extended to analyse the effect of orifice diameters on pressure fluctuations, and in the process also observe and identify the phenomena of cavitation. To obtain a more detailed understanding of the flow and the underlying behaviour, a Large-Eddy Simulation (LES) of orifice flow is performed for a selected orifice. The LES results are validated using different databases involving previous studies and the experiments that have been performed. The LES results are analysed in detail with regards to the spectral characteristics of velocity and pressure fluctuations using mathematical tools such as Fourier Analysis. The results provide an insight on the flow development, energy distribution and power spectrum distribution in the flow

Original languageEnglish
Title of host publicationProceedings of the 26th International Congress on Sound and Vibration, ICSV 2019
PublisherCanadian Acoustical Association
ISBN (Electronic)9781999181000
Publication statusPublished - 2019
Event26th International Congress on Sound and Vibration, ICSV 2019 - Montreal, Canada
Duration: 7 Jul 201911 Jul 2019

Conference

Conference26th International Congress on Sound and Vibration, ICSV 2019
Country/TerritoryCanada
CityMontreal
Period7/07/1911/07/19

Keywords

  • CAVITATION
  • FLOW INDUCED VIBRATIONS
  • LARGE EDDY SIMULATION)
  • ORIFICE FLOWS

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