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Abstract: In
order to study the cavitating flow in a Kaplan turbine, the numerical
simulation with a full cavitation model and a mixture two-phase flow
model, which are in commercial code Fluent 6.1, has been performed to
the unsteady cavitating turbulent flow within the whole flow passage of
a Kaplan turbine in a hydraulic power plant. Based on the simulating
results, the region and the degree of cavitation occurred in the flow
passage of the turbine running in a given working condition are
predicted, the energy performance of the turbine is also evaluated. The
predicted cavitation phenomena coincide with those observed in the
cavitation experiment to a corresponding model turbine. It shows that
the numerical simulation results can provide references for the running
performance prediction of a Kaplan turbine.
Key words: Kaplan
turbine Whole flow passage Unsteady cavitating turbulent
flow Numerical simulation
CLC No: TK123
国家自然科学基金(90410019)和中国博士后科学基金(2004035045)资助项目
. Received 20050726,
received in revised form 20051223
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