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TECHNICAL PAPERS

Analysis and Optimization of Transonic Centrifugal Compressor Impellers Using the Design of Experiments Technique

[+] Author and Article Information
Duccio Bonaiuti, Andrea Arnone, Mirco Ermini

“Sergio Stecco” Department of Energy Engineering, University of Florence, 50139 Florence, Italy

Leonardo Baldassarre

GE Nuovo Pignone, 50127 Florence, Italy

J. Turbomach 128(4), 786-797 (Sep 27, 2006) (12 pages) doi:10.1115/1.1579507 History: Received February 13, 2002; Revised May 01, 2003; Online September 27, 2006
Copyright © 2006 by ASME
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References

Figures

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Geometrical parameterization of the impeller
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Correlation between the axial length and the flow coefficient
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Meridional channel parameterization
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Blade turning angle parameterization
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Effect of the maximum value of the hub β distribution
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Effect of the maximum value of the shroud β distribution
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Limit distributions of the inlet and outlet β shape
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Effect of the inlet shape of the shroud β distribution
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Effect of the outlet shape of the shroud β distribution
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Effect of the grid dimension on the efficiency curve and on the midspan blade pressure distribution at design point, for a reference impeller
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Computational grids: 360,000 point grid (left) and 70,000 point grid (right)
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First analysis: linear and quadratic weights of the single factors in the response functions
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First analysis: examples of interaction plots
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First analysis: Pareto front
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Second analysis: linear and quadratic weights of the single factors in the response functions
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Second analysis: example of interaction plots between β2 and DR for a fixed number of blades
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Comparison of the efficiency curve between the original and optimized configuration, for the first (a), the second (b), and the third (c) impeller
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Comparison of the meridional contour curve between the original and optimized configuration, for the first (a), the second (b), and the third (c) impeller
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Comparison of the β distribution curve between the original and optimized configuration, for the first (a), the second (b), and the third (c) impeller

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