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International Journal of Rotating Machinery
Volume 2016, Article ID 4849025, 13 pages
Research Article

Genetic Algorithm Optimization of the Volute Shape of a Centrifugal Compressor

Institute of Mechanics and Fluid Dynamics, Technical University Bergakademie Freiberg, 09599 Freiberg, Germany

Received 30 December 2015; Accepted 21 March 2016

Academic Editor: Farid Bakir

Copyright © 2016 Martin Heinrich and Rüdiger Schwarze. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A numerical model for the genetic optimization of the volute of a centrifugal compressor for light commercial vehicles is presented. The volute cross-sectional shape is represented by cubic B-splines and its control points are used as design variables. The goal of the global optimization is to maximize the average compressor isentropic efficiency and total pressure ratio at design speed and four operating points. The numerical model consists of a density-based solver in combination with the SST - turbulence model with rotation/curvature correction and the multiple reference frame approach. The initial validation shows a good agreement between the numerical model and test bench measurements. As a result of the optimization, the average total pressure rise and efficiency are increased by over compared to the initial designs of the optimization, while the maximum efficiency rise is nearly 2.5% at  kg/s.