Experimental investigation of turbulent flow through single-hole orifice placed in a pipe by means of time-resolved Particle Image Velocimetry and unsteady pressure measurements

V. Anantharaman, N. Waterson, G. Nakiboglu, M Persin, Bas van Oudheusden

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientific

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Abstract

The flow passing through a sharp-edged orifice is studied using two experimental techniques over a pipe Reynolds number range of 4000 to 27000. The flow separates at the orifice inlet and is accelerated through its hole in the form of a confined jet. For a given orifice, the mean reattachment length is found to remain fairly independent of the inflow Reynolds number. Velocity and pressure fluctuations attain peak values in regions lying upstream of the mean reattachment point. Under the conditions tested, the orifice jet shows a low frequency flapping motion which was observed to occur at a Strouhal number 0:02 based on the orifice jet velocity and the difference in internal diameters of the pipe and orifice.
Original languageEnglish
Title of host publicationFIV 2016: Proceedings of the 11th International Conference on Flow-Induced Vibrations
Subtitle of host publicationThe Hague, The Netherlands
Number of pages7
Publication statusPublished - 2016
Event11th International Conference on Flow-Induced Vibrations - New Babylon Conference Center, The Hague, Netherlands
Duration: 4 Jul 20166 Jul 2016
Conference number: 11
http://fiv2016.com

Conference

Conference11th International Conference on Flow-Induced Vibrations
Abbreviated titleFIV2016
CountryNetherlands
CityThe Hague
Period4/07/166/07/16
Internet address

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