Flow field UVP measurements of a Y-shape outlet structure

Y-shape outlet structures are used to release the turbine water into a reservoir. Classical design oftenuses a Y-shape over a certain length and with a specific opening angle. Depending on the geometry,especially in turbine mode, significant undesired flow separations may occur at the bifurcation.Investigations were performed with physical model tests using ultrasonic profilers at 1 and 2 MHzemission frequencies in order to assess an approach to control the design of an outlet structure bymeasuring the flow field and its fluctuations. The distribution and fluctuation of the flow velocities, bothat the exit section as well as along the tunnel axes for both outlet openings of the Y-shape geometryallow detecting potential flow detachment at the bifurcation.


Editor(s):
Fischer, Stéphane
Pallarès, Anne
Burckbuchler, Marie
Published in:
Proceedings of the 9th International Symposium on Ultrasonic Doppler Methods for Fluid Mechanics and Fluid Engineering, 61-64
Presented at:
9th International Symposium on Ultrasonic Doppler Methods for Fluid Mechanics and Fluid Engineering, Strasbourg, August 27-29 2014
Year:
2014
Publisher:
Strasbourg
ISBN:
978-2-9549783-0-7
Keywords:
Note:
[1019]
Laboratories:




 Record created 2015-05-06, last modified 2018-01-28

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