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TECHNICAL PAPERS: Power

Direct Constrained Computational Fluid Dynamics Based Optimization of Three-Dimensional Blading for the Exit Stage of a Large Power Steam Turbine

[+] Author and Article Information
P. Lampart

Institute of Fluid Flow Machinery, Polish Academy of Sciences, Gdansk, Polande-mail: lampart@imp.gda.pl

S. Yershov

Institute of Mechanical Engineering Problems, Ukrainian Academy of Sciences, Kharkov, Ukrainee-mail: yershov@ipmach.kharkov.ua

J. Eng. Gas Turbines Power 125(1), 385-390 (Dec 27, 2002) (6 pages) doi:10.1115/1.1520157 History: Received April 26, 2001; Revised May 22, 2002; Online December 27, 2002
Copyright © 2003 by ASME
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References

Figures

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Original geometry of the LP exit stage: meridional view (top left), circumferential view of stator leading and trailing edges (top right), and stator and rotor profiles (bottom)
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Final geometry with optimized straight and compound circumferential leans: meridional view (left), circumferential view of stator leading and trailing edges (right)
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Final geometry with optimized straight and compound axial sweeps: meridional view (left), circumferential view of stator leading and trailing edges (right)
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Spanwise circumferentially averaged distribution of stage reaction, stator loss, rotor loss, and stage loss with the exit energy in the exit stage for three mass flow rates: 38 kg/s (left), 56 kg/s (center), 75 kg/s (right) for the original stage (1), stage with circumferential leans (2), and stage with axial sweeps (3)
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Mach number contours in the stator 10% of the blade span from the root for the mass flow rate of 56 kg/s for the original stage (left) and stage with circumferential leans (right)
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Mach number contours in the rotor 10% of the blade span from the root for the mass flow rates of 56 kg/s (top) and 75 kg/s (bottom) for the original stage (left) and stage with circumferential leans (right)
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Enthalpy-entropy diagram for a turbine stage

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