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POST DOC.
Background
In the last two decades several high head
Francis turbines have failed due to rotor-stator
interaction (RSI) and resonance issues.
Some have failed after a few hours, others
have lasted months, or years, before failing.
To prevent such failures, it is important to
understand the physics behind these failures.
Every harmonic oscillating system consists of
a natural frequency and a damping. In order
to predict the frequency response of such a
system, both the natural frequency and damping
must be known. Since resonance plays an
important role in many of the failures, the effect
flowing water has on the natural frequency and
damping is considered a natural starting point
in this research.
There is currently no research openly available
for all turbine manufacturers to validate their
numerical tools with respect to damping and
natural frequency. This experiment aims to
improve the knowledge on the fluid structure
interaction (FSI) between flowing water and
oscillating structures, while at the same time
providing an open platform to validate numerical
tools.
Department of Energy
and Process Engineering
2016-2018
Pressure Pulsations
and Fatigue in High
Head Francis Turbines
Supervisor:
Ole Gunnar Dahlhaug
Bjørn Winther Solemslie
Post Doc.
Waterpower Laboratory
2016 - 2018
Pressure pulsations and
fatigue in High Head
Franc turbines
By: Bjørn Winther Solemslie
Supervisor: Ole Gunnar Dahlhaug
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