Numerical Simulation With Flow Feature
Extraction Of A Propeller Turbine Unsteady
Rotor-stator Interaction
Author(s)
J.-M. Gagnon & C. Deschênes
Abstract
We have seen many papers in the past few years reporting research on Francis
hydraulic turbine flow. Interesting papers assessing the accuracy of the CFD
numerical simulation were also presented for axial turbine draft tubes, as in the
three Turbine 99 workshops. However, little knowledge is available on the flow
taking place inside an axial turbine.
This paper focuses on the unsteady rotor-stator interaction in a propeller axial
turbine. The flow behaviour is analysed at different rotor and stator relative
locations with numerical simulations using a commercial code and k- ε turbulence
model. The main goal is to study unsteady flow phenomena such as wake,
separation, forces and pressure fluctuations in the propeller turbine. This
investigation will help to design a series of flow measurements used in turn to
improve future CFD simulations with realistic velocity profiles as boundary
conditions.
Keywords: propeller turbine, numerical simulation, blade torque, partial load.
1 Introduction
Low head power plants are expected to be implemented increasingly in the future
for economical, geographical and environmental purposes. Propeller turbines are
well suited for these types of applications. They operate at higher flow rate,
smaller head and faster rotational speed, thus being more compact than other
types of machines. The US Department of Energy (DOE) is anticipating major
growth for low head power plants [1] and studies such as Turbine 99 [2] or the
work of Roussopoulos and Muntean [3, 4] show research trends on axial
hydraulic machine. On a global perspective, optimization of size and weight
Keywords
propeller turbine, numerical simulation, blade torque, partial load.
Related Book
Other papers in this volume
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