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Phase resolved velocity measurements at the draft tube cone of the turbine-99 test case
Vattenfall Research & Development.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.
2008 (English)In: Hydro technology and the evironment for the new century: 24th IAHR Symposium on Hydraulic Machinery and Systems, October 27 - 31, 2008, Foz do Iguassu, Brazil, Foz do Iguassu, 2008Conference paper (Refereed)
Abstract [en]

The Turbine-99 test case, a Kaplan draft tube, has been studied extensively both experimentally and numerically. To further complete the experimental data of this test case, phase resolved velocity profiles in the draft tube cone are presented in this paper. The phase resolved velocity profiles have been measured with a 2-component LDA equipment measuring both the tangential and the axial velocity components of the flow. The measurements were synchronised with a pulse from the runner shaft that gives the angular position/phase of each velocity measurement. The result shows a clear impact of the runner blade wakes on the flow distribution in the draft tube cone. Further down in the cone the blade wakes are still visible, even if noticeable weaker, and they have increased their extent in the tangential direction.

Place, publisher, year, edition, pages
Foz do Iguassu, 2008.
Research subject
Fluid Mechanics
URN: urn:nbn:se:ltu:diva-30356Local ID: 42276920-b00f-11dd-b677-000ea68e967bISBN: 978-85-60858-13-1 (PDF)OAI: diva2:1003583
IAHR Symposium on Hydraulic Machinery and Systems : 27/10/2008 - 31/10/2008
Godkänd; 2008; Bibliografisk uppgift: 1 CD-ROM; 20081111 (ysko)Available from: 2016-09-30 Created: 2016-09-30Bibliographically approved

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