This paper presents a study of the three-dimensional flow field within the blade rows of a high-pressure axial flow steam turbine stage. Compound lean angles have been employed to achieve relatively low blade loading for hub and tip sections and so reduce the secondary losses. The flow field is investigated in a Low-Speed Research Turbine using pneumatic and hot-wire probes downstream of the blade row. Steady and unsteady numerical simulations were performed using structured 3D Navier-Stokes solver to further understand the flow field. Agreement between the simulations and the measurements has been found. The unsteady measurements indicate that there is a significant effect of the stator flow interaction in the downstream rotor blade. The transport of the stator viscous flow through the rotor blade row is described. Unsteady numerical simulations were found to be successful in predicting accurately the flow near the secondary flow interaction regions compared to steady simulations. A method to calculate the unsteady loss generated inside the blade row was developed from the unsteady numerical simulations. The contribution of various regions in the blade to the unsteady loss generation was evaluated. This method can assist the designer in identifying and optimizing the features of the flow that are responsible for the majority of the unsteady loss production. An analytical model was developed to quantify this effect for the vortex transport inside the downstream blade.
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ASME Turbo Expo 2002: Power for Land, Sea, and Air
June 3–6, 2002
Amsterdam, The Netherlands
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
0-7918-3610-X
PROCEEDINGS PAPER
Blade Row Interaction in a High Pressure Steam Turbine Available to Purchase
V. S. P. Chaluvadi,
V. S. P. Chaluvadi
Cambridge University, Cambridge, UK
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A. I. Kalfas,
A. I. Kalfas
Cambridge University, Cambridge, UK
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H. P. Hodson,
H. P. Hodson
Cambridge University, Cambridge, UK
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H. Ohyama,
H. Ohyama
Mitsubishi Heavy Industries, Takasago, Hyogo, Japan
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E. Watanabe
E. Watanabe
Mitsubishi Heavy Industries, Takasago, Hyogo, Japan
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V. S. P. Chaluvadi
Cambridge University, Cambridge, UK
A. I. Kalfas
Cambridge University, Cambridge, UK
H. P. Hodson
Cambridge University, Cambridge, UK
H. Ohyama
Mitsubishi Heavy Industries, Takasago, Hyogo, Japan
E. Watanabe
Mitsubishi Heavy Industries, Takasago, Hyogo, Japan
Paper No:
GT2002-30574, pp. 957-968; 12 pages
Published Online:
February 4, 2009
Citation
Chaluvadi, VSP, Kalfas, AI, Hodson, HP, Ohyama, H, & Watanabe, E. "Blade Row Interaction in a High Pressure Steam Turbine." Proceedings of the ASME Turbo Expo 2002: Power for Land, Sea, and Air. Volume 5: Turbo Expo 2002, Parts A and B. Amsterdam, The Netherlands. June 3–6, 2002. pp. 957-968. ASME. https://doi.org/10.1115/GT2002-30574
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