Publication

Dynamic Pressure Measurements on a Model Turbine Runner and their Use in Preventing Runner Fatigue Failure

François Avellan
2000
Conference Papers

Abstract

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.

Official source

https://infoscience.epfl.ch/entities/publication/47fd3795-6d71-4f01-8821-1979fbb7d68e

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François Avellan
2000
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/47fd3795-6d71-4f01-8821-1979fbb7d68e

About this result

Related concepts (32)

Water turbine

A water turbine is a rotary machine that converts kinetic energy and potential energy of water into mechanical work. Water turbines were developed in the 19th century and were widely used for industrial power prior to electrical grids. Now, they are mostly used for electric power generation. Water turbines are mostly found in dams to generate electric power from water potential energy. Water wheels have been used for hundreds of years for industrial power. Their main shortcoming is size, which limits the flow rate and head that can be harnessed.

Kaplan turbine

The Kaplan turbine is a propeller-type water turbine which has adjustable blades. It was developed in 1913 by Austrian professor Viktor Kaplan, who combined automatically adjusted propeller blades with automatically adjusted wicket gates to achieve efficiency over a wide range of flow and water level. The Kaplan turbine was an evolution of the Francis turbine. Its invention allowed efficient power production in low-head applications which was not possible with Francis turbines.

Hydraulic machinery

Hydraulic machines use liquid fluid power to perform work. Heavy construction vehicles are a common example. In this type of machine, hydraulic fluid is pumped to various hydraulic motors and hydraulic cylinders throughout the machine and becomes pressurized according to the resistance present. The fluid is controlled directly or automatically by control valves and distributed through hoses, tubes, or pipes.

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Dynamic Pressure Measurements on a Model Turbine Runner and their Use in Preventing Runner Fatigue Failure

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