Abstract
On the basis of experimental and numerical data, physically based relationships have been derived in order to describe the main features of steam flow through the last stages of a multi-stage low pressure turbine. These relationships have been implemented in a multiblock model. Comparison between experimental and calculated data proves that this new tool allows to correctly predict the maximum fluid temperature, the velocity field and the power exchange between fluid and blades when last stages operate at near zero volume flow. This quasi-dimensional approach allows the mechanical and thermo-economic optimization of steam turbine power plants running continuously at low volume flow without using any CFD calculation.
Published Version
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