m f f r V U V 2 2 Sizing of A Turbine Stage Theoretical Model for Loss

# M f f r v u v 2 2 sizing of a turbine stage

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m f f r V U V 2 2

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Sizing of A Turbine Stage
Theoretical Model for Loss Estimation The losses in any blade row will be proportional to the dynamic head or kinetic energy in the row. Define the coefficient f s as the ratio of the shaft work output to the sum of the mean kinetic energies within stator + rotor. 2 3 2 2 0 a a s V V h f 1 4 2 2 2 s f For a 50% reaction turbine:

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Performance Vs Size of A Turbine f s =
2 03 01 2 03 01 m a p a p r T T C U T T C 2 2 3 3 sin sin r r b V V U m P U V V r T T C r r m a p 2 2 3 3 2 03 01 sin sin U V V f f 2 2 3 3 tan tan U V f 2 3 tan tan 2 3 tan tan V r2 V a2 V r3 V a3 V f V w

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2 3 tan tan V r2 V a2 V r3 V a3 V f V w U V f
90- Selection of Geometrical Parameters

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(  Selection of Geometrical Parameters /
(      Selection of Geometrical Parameters

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Design Algorithm
Design Algorithm

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Model turbine instrumentation
Design validation
• Fall '19
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