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Influence of compound lean on an industrial steam turbine stage

Deshpande, Srikanth LU ; Thern, Marcus LU and Genrup, Magnus LU (2015) ASME 2015 Gas Turbine India Conference, GTINDIA 2015 In ASME 2015 Gas Turbine India Conference, GTINDIA 2015
Abstract

Compound lean implemented on stator of an industrial steam turbine stage in order to reduce secondary losses are discussed. Baseline stator is a prismatic vane with aspect ratio of unity. Compound lean stator blade is designed by shearing the airfoil sections in tangential direction. Modifications are analyzed numerically using commercial code CFX. Three blade rows i.e. one complete stage with a downstream stator are analyzed. Steady state Reynolds averaged Navier Stokes equations are solved. Total pressure loss (TPL) is used as objective function to monitor reduction in secondary losses. Rotor is retained the same for baseline as well as compound leaned stator. Results show reduction in total pressure loss of stator in excess of 5%.... (More)

Compound lean implemented on stator of an industrial steam turbine stage in order to reduce secondary losses are discussed. Baseline stator is a prismatic vane with aspect ratio of unity. Compound lean stator blade is designed by shearing the airfoil sections in tangential direction. Modifications are analyzed numerically using commercial code CFX. Three blade rows i.e. one complete stage with a downstream stator are analyzed. Steady state Reynolds averaged Navier Stokes equations are solved. Total pressure loss (TPL) is used as objective function to monitor reduction in secondary losses. Rotor is retained the same for baseline as well as compound leaned stator. Results show reduction in total pressure loss of stator in excess of 5%. Also, computations of coefficient of secondary kinetic energy shows significant reduction in secondary losses in excess of 30% in stator. Efficiency gained by implementation of compound lean are discussed.

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type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
ASME 2015 Gas Turbine India Conference, GTINDIA 2015
pages
8 pages
publisher
American Society of Mechanical Engineers
conference name
ASME 2015 Gas Turbine India Conference, GTINDIA 2015
external identifiers
  • Scopus:84964330278
ISBN
9780791857311
DOI
10.1115/GTINDIA2015-1221
language
English
LU publication?
yes
id
de7a7ed7-de81-4d54-9e65-27c71b98f556
date added to LUP
2016-05-24 13:12:22
date last changed
2017-01-01 08:26:54
@inproceedings{de7a7ed7-de81-4d54-9e65-27c71b98f556,
  abstract     = {<p>Compound lean implemented on stator of an industrial steam turbine stage in order to reduce secondary losses are discussed. Baseline stator is a prismatic vane with aspect ratio of unity. Compound lean stator blade is designed by shearing the airfoil sections in tangential direction. Modifications are analyzed numerically using commercial code CFX. Three blade rows i.e. one complete stage with a downstream stator are analyzed. Steady state Reynolds averaged Navier Stokes equations are solved. Total pressure loss (TPL) is used as objective function to monitor reduction in secondary losses. Rotor is retained the same for baseline as well as compound leaned stator. Results show reduction in total pressure loss of stator in excess of 5%. Also, computations of coefficient of secondary kinetic energy shows significant reduction in secondary losses in excess of 30% in stator. Efficiency gained by implementation of compound lean are discussed.</p>},
  author       = {Deshpande, Srikanth and Thern, Marcus and Genrup, Magnus},
  booktitle    = {ASME 2015 Gas Turbine India Conference, GTINDIA 2015},
  isbn         = {9780791857311},
  language     = {eng},
  pages        = {8},
  publisher    = {American Society of Mechanical Engineers},
  title        = {Influence of compound lean on an industrial steam turbine stage},
  url          = {http://dx.doi.org/10.1115/GTINDIA2015-1221},
  year         = {2015},
}