Details
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 7th European Conference on Turbomachinery: Fluid Dynamics and Thermodynamics, ETC 2007 |
| Publication status | Published - 1 Jan 2007 |
| Event | 7th European Conference on Turbomachinery: Fluid Dynamics and Thermodynamics, ETC 2007 - Athens, Greece Duration: 5 Mar 2007 → 9 Mar 2007 |
Abstract
In a multilevel design approach, several numerical leakage flow models are required to optimize an impulse stage. These are flows through labyrinth seals of diaphragm glands, over blade shrouds, and in chambers of discs with balance holes. Results of the main flow calculations are the boundary conditions for calculating the leakage path, and vice versa. The numerical models were built and computed using the commercial CFD solver FLUENT 5. Computational results are compared to experimental data obtained on air-powered model steam turbine stages with either radial-twisted or leaned-twisted guide vanes. The flow coefficients for the flow model through the double-strip and step type labyrinth seals were validated with results obtained in a plane wind tunnel. The numerical models determine the leakage mass flow and friction losses with reasonable accuracy. The presented experimental data show the importance of calculating the leakage flows for the prediction of turbine stage efficiency with differently leaned 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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Proceedings of the 7th European Conference on Turbomachinery: Fluid Dynamics and Thermodynamics, ETC 2007. 2007.
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - CFD models for blade tip and diaphragm gland leakage flow in turbines of disc-and-diaphragm design
AU - Sadovnichiy, Victor N.
AU - Alhaj, Olga
AU - Binner, Matthias
AU - Seume, Joerg R.
PY - 2007/1/1
Y1 - 2007/1/1
N2 - In a multilevel design approach, several numerical leakage flow models are required to optimize an impulse stage. These are flows through labyrinth seals of diaphragm glands, over blade shrouds, and in chambers of discs with balance holes. Results of the main flow calculations are the boundary conditions for calculating the leakage path, and vice versa. The numerical models were built and computed using the commercial CFD solver FLUENT 5. Computational results are compared to experimental data obtained on air-powered model steam turbine stages with either radial-twisted or leaned-twisted guide vanes. The flow coefficients for the flow model through the double-strip and step type labyrinth seals were validated with results obtained in a plane wind tunnel. The numerical models determine the leakage mass flow and friction losses with reasonable accuracy. The presented experimental data show the importance of calculating the leakage flows for the prediction of turbine stage efficiency with differently leaned guide vanes.
AB - In a multilevel design approach, several numerical leakage flow models are required to optimize an impulse stage. These are flows through labyrinth seals of diaphragm glands, over blade shrouds, and in chambers of discs with balance holes. Results of the main flow calculations are the boundary conditions for calculating the leakage path, and vice versa. The numerical models were built and computed using the commercial CFD solver FLUENT 5. Computational results are compared to experimental data obtained on air-powered model steam turbine stages with either radial-twisted or leaned-twisted guide vanes. The flow coefficients for the flow model through the double-strip and step type labyrinth seals were validated with results obtained in a plane wind tunnel. The numerical models determine the leakage mass flow and friction losses with reasonable accuracy. The presented experimental data show the importance of calculating the leakage flows for the prediction of turbine stage efficiency with differently leaned guide vanes.
UR - http://www.scopus.com/inward/record.url?scp=85043443634&partnerID=8YFLogxK
M3 - Conference contribution
BT - Proceedings of the 7th European Conference on Turbomachinery: Fluid Dynamics and Thermodynamics, ETC 2007
T2 - 7th European Conference on Turbomachinery: Fluid Dynamics and Thermodynamics, ETC 2007
Y2 - 5 March 2007 through 9 March 2007
ER -