Wall Friction and Boundary Layer Development in the Cone of a Francis Turbine Scale Model

To characterize the boundary layer development, in the cone of the Francis turbine, wall friction and velocity measurements are performed. The mean wall friction measurements evidence the increasing risk of the boundary layer separation at the cone wall with the increase of the discharge. The flow surveys close to the wall evidence a development of a 3D boundary layer under adverse pressure gradient. The analysis of the results reveals that the composite power law of Barenblatt and Chorin is a good approximation for the velocity profiles in the near wall region for the 4 operating points considered.


Published in:
Proceedings of the 22nd IAHR Symposium on Hydraulic Machinery and Systems, Stockholm, Sweden, 1, 1-13
Presented at:
22nd IAHR Symposium on Hydraulic Machinery and Systems, Stockholm, Sweden, June 29 – July 2, 2004
Year:
2004
Publisher:
International Association For Hydraulic Research
Laboratories:


Note: The status of this file is: EPFL only


 Record created 2005-11-04, last modified 2018-08-14

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