Efficiency improvements in an industrial steam turbine stage - Part 2
(2016) ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition, GT 2016 2B-2016.- Abstract
Improvement in isentropic total to total efficiency of a low reaction turbine stage by airfoil redesign was considered in first part of the paper. Further, modifications in the flow path of the baseline stage is considered in second part of the paper. Flow path of the baseline stage incorporates axisymmetric meridional endwall contour(commonly called Russian kink). For a stage comprising of high aspect ratio blades, assessment of performance with endwall contour is performed. Alternatives, if required for endwall contour had to be explored and numerically verified. Endeavor in the present paper is in this direction. Static pressure distribution at the stator exit is considered as the main objective. Along with flow path modification,... (More)
Improvement in isentropic total to total efficiency of a low reaction turbine stage by airfoil redesign was considered in first part of the paper. Further, modifications in the flow path of the baseline stage is considered in second part of the paper. Flow path of the baseline stage incorporates axisymmetric meridional endwall contour(commonly called Russian kink). For a stage comprising of high aspect ratio blades, assessment of performance with endwall contour is performed. Alternatives, if required for endwall contour had to be explored and numerically verified. Endeavor in the present paper is in this direction. Static pressure distribution at the stator exit is considered as the main objective. Along with flow path modification, stator modifications like vortexing and lean are attempted to obtain stator exit static pressure distribution similar to baseline case. Straight lean on stator provides good results in terms of reducing stator exit pressure gradient as well as reducing gradient of rotor inlet swirl. Since the pressure distribution at stator exit also drives the tip leakage flow, effect of flowpath and stator modifications on tip leakage flow is studied. Performance numbers are reported for cases with and without tip shroud.
(Less)
- author
- Deshpande, Srikanth LU ; Thern, Marcus LU and Genrup, Magnus LU
- organization
- publishing date
- 2016
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- host publication
- Turbomachinery
- volume
- 2B-2016
- publisher
- American Society Of Mechanical Engineers (ASME)
- conference name
- ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition, GT 2016
- conference location
- Seoul, Korea, Republic of
- conference dates
- 2016-06-13 - 2016-06-17
- external identifiers
-
- scopus:84991759468
- ISBN
- 9780791849705
- DOI
- 10.1115/GT2016-57140
- language
- English
- LU publication?
- yes
- id
- 366d3421-0678-426d-b3c1-1fb94960a65a
- date added to LUP
- 2017-03-20 11:07:59
- date last changed
- 2022-01-30 19:03:07
@inproceedings{366d3421-0678-426d-b3c1-1fb94960a65a,
abstract = {{<p>Improvement in isentropic total to total efficiency of a low reaction turbine stage by airfoil redesign was considered in first part of the paper. Further, modifications in the flow path of the baseline stage is considered in second part of the paper. Flow path of the baseline stage incorporates axisymmetric meridional endwall contour(commonly called Russian kink). For a stage comprising of high aspect ratio blades, assessment of performance with endwall contour is performed. Alternatives, if required for endwall contour had to be explored and numerically verified. Endeavor in the present paper is in this direction. Static pressure distribution at the stator exit is considered as the main objective. Along with flow path modification, stator modifications like vortexing and lean are attempted to obtain stator exit static pressure distribution similar to baseline case. Straight lean on stator provides good results in terms of reducing stator exit pressure gradient as well as reducing gradient of rotor inlet swirl. Since the pressure distribution at stator exit also drives the tip leakage flow, effect of flowpath and stator modifications on tip leakage flow is studied. Performance numbers are reported for cases with and without tip shroud.</p>}},
author = {{Deshpande, Srikanth and Thern, Marcus and Genrup, Magnus}},
booktitle = {{Turbomachinery}},
isbn = {{9780791849705}},
language = {{eng}},
publisher = {{American Society Of Mechanical Engineers (ASME)}},
title = {{Efficiency improvements in an industrial steam turbine stage - Part 2}},
url = {{http://dx.doi.org/10.1115/GT2016-57140}},
doi = {{10.1115/GT2016-57140}},
volume = {{2B-2016}},
year = {{2016}},
}