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Measurement of pressure pulsations in Francis turbines

Abstract

The work presented in this thesis involves preparation and execution of measurements on Francis runners. The measurements were performed by means of onboard measuring equipment both in model runners and full-scale prototype runners. Also, analysis of the measured data, and the discussion of the results, is presented. The measurements resulted in large data sets. These data sets were used by the author to investigate the dynamic pressure and strain in the runners. The results of the analysis can be used as input in future turbine design. Andritz Hydro AG has used the data for verification of their numerical simulation tools. In connection with the refurbishment of Tokke power plant, two model runners were made available for onboard pressure measurements. To investigate the dynamic pressure in these runners, methods for integration of pressure transducers in the runner blades needed to be developed. After initial difficulties during the preparation, successful measurements were obtained from both model runners. At Tokke power plant, both the original and replacement runners were made accessible for onboard pressure and strain gauge measurements. On the original Kvaerner Brug AS runner, the test was prepared and performed by the author. This test failed, due to water intrusion in the  More>>
Authors:
Publication Date:
Nov 15, 2010
Product Type:
Thesis/Dissertation
Resource Relation:
Other Information: Doctoral theses at NTNU; ISSN 1503-8181; 2010:137; Numerical Data; Thesis or Dissertation; TH: Thesis (Ph.D); refs., figs., tabs
Subject:
13 HYDRO ENERGY; TURBINES; HYDROELECTRIC POWER PLANTS; DESIGN; PRESSURE MEASUREMENT; PRESSURE CONTROL; VANES; FINS; EXPERIMENTAL DATA
OSTI ID:
1007307
Research Organizations:
Norges teknisk-naturvitenskapelige universitet, Trondheim (Norway)
Country of Origin:
Norway
Language:
English
Other Identifying Numbers:
Other: ISBN 978-82-471-2240-2; TRN: NO1105047
Availability:
Available at: http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-11715
Submitting Site:
NW
Size:
127 p. pages
Announcement Date:
Mar 07, 2011

Citation Formats

Kobro, Einar. Measurement of pressure pulsations in Francis turbines. Norway: N. p., 2010. Web.
Kobro, Einar. Measurement of pressure pulsations in Francis turbines. Norway.
Kobro, Einar. 2010. "Measurement of pressure pulsations in Francis turbines." Norway.
@misc{etde_1007307,
title = {Measurement of pressure pulsations in Francis turbines}
author = {Kobro, Einar}
abstractNote = {The work presented in this thesis involves preparation and execution of measurements on Francis runners. The measurements were performed by means of onboard measuring equipment both in model runners and full-scale prototype runners. Also, analysis of the measured data, and the discussion of the results, is presented. The measurements resulted in large data sets. These data sets were used by the author to investigate the dynamic pressure and strain in the runners. The results of the analysis can be used as input in future turbine design. Andritz Hydro AG has used the data for verification of their numerical simulation tools. In connection with the refurbishment of Tokke power plant, two model runners were made available for onboard pressure measurements. To investigate the dynamic pressure in these runners, methods for integration of pressure transducers in the runner blades needed to be developed. After initial difficulties during the preparation, successful measurements were obtained from both model runners. At Tokke power plant, both the original and replacement runners were made accessible for onboard pressure and strain gauge measurements. On the original Kvaerner Brug AS runner, the test was prepared and performed by the author. This test failed, due to water intrusion in the logging chain. The second test was performed on the Andritz Hydro AG replacement runner. This test was prepared and performed by the author in close cooperation with Andritz Hydro AG, and the results were successful. The analysis results from both model and prototype runners show that the wake leaving the guide vanes is the most severe source of dynamic pressure in the runner. The draft tube vortex rope pulsation propagates upstream the runner, but does not appear as a significant frequency in the runner strain measurements. (Author)}
place = {Norway}
year = {2010}
month = {Nov}
}