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TECHNICAL PAPERS: Gas Turbines: Cycle Innovations

Models for the Prediction of Transients in Closed Regenerative Gas Turbine Cycles With Centrifugal Impellers

[+] Author and Article Information
Theodosios Korakianitis

University of Glasgow, Glasgow G12 8QQ, UKe-mail: t.Alexander@mech.gla.ac.uk

N. E. Vlachopoulos

Panafon SA, Athens, Greece

D. Zou

Department of Physical Therapy, Washington University, St Louis, MO 63130

J. Eng. Gas Turbines Power 127(3), 505-513 (Jun 24, 2005) (9 pages) doi:10.1115/1.1806450 History: Received November 01, 1993; Revised February 01, 1994; Online June 24, 2005
Copyright © 2005 by ASME
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References

Figures

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Component schematic and temperature-entropy diagram for the regenerative Brayton cycle. (The value of S1 is arbitrary).
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Rotating-passage geometry for centrifugal impellers
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Control-volume model with 1-D variations for the centrifugal impeller passages
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Compressor and turbine impeller geometries expressed in nondimensional parameter form. Key turbomachinery dimensions are included in the Appendix.
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First sample case. System response with constant-speed/variable-work model to 15% sinusoidal variation in Tsl. Table 2 identifies the different line types used in the figure.
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Second sample case. System response with constant-speed/variable-work model to 15% double-step variation in Tsl. Table 2 identifies the different line types used in the figure.
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Third sample case. System response with variable-speed/constant-alternator-work model to 0.5% sinusoidal variation in Tsl. Table 2 identifies the different line types used in the figure.
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Fourth sample case. System response with variable-speed/constant-alternator-work model to 5% sinusoidal variation in Tsl. Table 2 identifies the different line types used in the figure.
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Fifth sample case. System response with variable-speed/constant-alternator-work model to 5% double-step variation in Tsl. Table 2 identifies the different line types used in the figure.
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A comparison of constant-speed/variable-work model with variable-speed/constant-alternator-work model to 5% sinusoidal variation in Tsl

Tables

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