Details
| Original language | English |
|---|---|
| Title of host publication | 8th European Conference on Turbomachinery |
| Subtitle of host publication | Fluid Dynamics and Thermodynamics, ETC 2009 - Conference Proceedings |
| Editors | M. Manna, F. Martelli, F. Heitmeir |
| Publisher | Technische Universitat Graz from Austria |
| Pages | 1459-1468 |
| Number of pages | 10 |
| ISBN (electronic) | 9783851250367 |
| Publication status | Published - 2009 |
| Event | 8th European Conference on Turbomachinery: Fluid Dynamics and Thermodynamics, ETC 2009 - Graz, Austria Duration: 23 Mar 2009 → 27 Mar 2009 |
Publication series
| Name | 8th European Conference on Turbomachinery: Fluid Dynamics and Thermodynamics, ETC 2009 - Conference Proceedings |
|---|---|
| ISSN (Print) | 2410-4833 |
Abstract
Two methods of reducing the shroud leakage losses have been analyzed: First, an optimized design of the outer casing with a wall step upstream of the rotor shroud ("shroud overlap") and, second, a leaning of the guide vanes. This study is based on experimental data and supported by CFD analysis. The experiments were conducted on a model steam turbine test rig at the State Technical University of St. Petersburg. The axial stages are equipped with identical blade shrouds and both radial-twisted and leaned-twisted guide vanes at different axial gaps and sealing fin numbers. The "shroud overlap" as well as the leaned-twisted guide vanes can significantly reduce the leakage ratio passing over the blade shrouds. However, the achieved leakage reduction depends on the number of sealing fins and the axial gap between the blade rows. Reducing the number of sealing fins or enlarging the axial gap increases the leakage ratio. This effect more strongly influences stages with leaned-twisted guide vanes.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Condensed Matter Physics
- Engineering(all)
- Mechanical Engineering
- Engineering(all)
- Mechanics of Materials
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8th European Conference on Turbomachinery: Fluid Dynamics and Thermodynamics, ETC 2009 - Conference Proceedings. ed. / M. Manna; F. Martelli; F. Heitmeir. Technische Universitat Graz from Austria, 2009. p. 1459-1468 (8th European Conference on Turbomachinery: Fluid Dynamics and Thermodynamics, ETC 2009 - Conference Proceedings).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - The influence of axial gaps and leaned-twisted guide vanes on the shroud leakage and turbine stage efficiency
AU - Sadovnichiy, Victor N.
AU - Binner, Matthias
AU - Seume, Joerg R.
PY - 2009
Y1 - 2009
N2 - Two methods of reducing the shroud leakage losses have been analyzed: First, an optimized design of the outer casing with a wall step upstream of the rotor shroud ("shroud overlap") and, second, a leaning of the guide vanes. This study is based on experimental data and supported by CFD analysis. The experiments were conducted on a model steam turbine test rig at the State Technical University of St. Petersburg. The axial stages are equipped with identical blade shrouds and both radial-twisted and leaned-twisted guide vanes at different axial gaps and sealing fin numbers. The "shroud overlap" as well as the leaned-twisted guide vanes can significantly reduce the leakage ratio passing over the blade shrouds. However, the achieved leakage reduction depends on the number of sealing fins and the axial gap between the blade rows. Reducing the number of sealing fins or enlarging the axial gap increases the leakage ratio. This effect more strongly influences stages with leaned-twisted guide vanes.
AB - Two methods of reducing the shroud leakage losses have been analyzed: First, an optimized design of the outer casing with a wall step upstream of the rotor shroud ("shroud overlap") and, second, a leaning of the guide vanes. This study is based on experimental data and supported by CFD analysis. The experiments were conducted on a model steam turbine test rig at the State Technical University of St. Petersburg. The axial stages are equipped with identical blade shrouds and both radial-twisted and leaned-twisted guide vanes at different axial gaps and sealing fin numbers. The "shroud overlap" as well as the leaned-twisted guide vanes can significantly reduce the leakage ratio passing over the blade shrouds. However, the achieved leakage reduction depends on the number of sealing fins and the axial gap between the blade rows. Reducing the number of sealing fins or enlarging the axial gap increases the leakage ratio. This effect more strongly influences stages with leaned-twisted guide vanes.
UR - http://www.scopus.com/inward/record.url?scp=84924941659&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84924941659
T3 - 8th European Conference on Turbomachinery: Fluid Dynamics and Thermodynamics, ETC 2009 - Conference Proceedings
SP - 1459
EP - 1468
BT - 8th European Conference on Turbomachinery
A2 - Manna, M.
A2 - Martelli, F.
A2 - Heitmeir, F.
PB - Technische Universitat Graz from Austria
T2 - 8th European Conference on Turbomachinery: Fluid Dynamics and Thermodynamics, ETC 2009
Y2 - 23 March 2009 through 27 March 2009
ER -