Dynamic Pressure Measurements on a Model Turbine Runner and their Use in Preventing Runner Fatigue Failure
Hydraulic turbine runners, which operate under a wide range of heads and outputs, are subjected to considerable dynamic forces at off design conditions. Therefore a detailed knowledge of mean and fluctuating pressures is required for a safe design of the runner. A special technique has been developed at EPFL-IMHEF Laboratory for Hydraulic Machines in Lausanne, Switzerland, to measure the pressures on the blade of a model runner with miniature piezo-resistive pressure transducers. It has been successfully used in the Voith Hydro Laboratory during the model test of a large Francis turbine. Typical results are presented and discussed, together with their transposition to prototype conditions and application in the dynamic stress and fatigue analysis of the runner.
AIRHPU_00_2.pdf
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Dynamic Pressure Measurements on a Model Turbine Runner and their Use in Preventing Runner Fatigue Failure.pdf
openaccess
CC BY
12.16 MB
Adobe PDF
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