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Robust optimization of turbomachinery cascades using inverse methods

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Abstract

It is widely known that real-world airfoils and turbomachinery cascades are subjected to small perturbations in their geometries due to the manufacturing errors and operational and environmental conditions. As a result, the performance requirements of such systems can be significantly affected, leading to poor designs or even severe failures during operation. In this context, the concept of robust optimal design in computational fluid dynamics is very interesting and can be conveniently carried out by using modern multiobjective numerical optimization techniques, in which the interest is to generate optimal and robust aerodynamic shapes that are less sensitive to small perturbations during their useful life. However, the large number of evaluations of the cost functions makes the use of direct methods in the robust optimization of turbomachinery cascades in aerodynamics very costly, sometimes unfeasible. Those difficulties motivate the study reported in this paper, in which a robust optimization strategy by using inverse methods is proposed consisting in the use of multiobjective evolutionary algorithms to be combined with robustness functions specially adapted to turbomachinery cascades.

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Acknowledgments

The authors are grateful to the Minas Gerais State Agency FAPEMIG for the financial support to their research activities, especially through research projects APQ-02386-10 (N. Manzanares-Filho) and TEC-APQ-02522-12 (A.M.G. de Lima) and the Brazilian Research Council – CNPq for the continued support to their research work.

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Authors and Affiliations

  1. Federal University of Itajubá, Mechanical Engineering Institute, Campus Prof. José R. Seabra, BPS, 1303, CEP 37500-000, Itajubá, MG, Brazil

    C. J. B. Reis & N. Manzanares-Filho

  2. Campus Santa Mônica, Federal University of Uberlândia, School of Mechanical Engineering, 593 CEP 38400-902, Uberlândia, MG, Brazil

    A. M. G. de Lima

Authors
  1. C. J. B. Reis
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  2. N. Manzanares-Filho
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  3. A. M. G. de Lima
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Correspondence to A. M. G. de Lima.

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Communicated by Marcelo A. Trindade.

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Reis, C.J.B., Manzanares-Filho, N. & de Lima, A.M.G. Robust optimization of turbomachinery cascades using inverse methods. J Braz. Soc. Mech. Sci. Eng. 38, 297–305 (2016). https://doi.org/10.1007/s40430-015-0309-5

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  • DOI: https://doi.org/10.1007/s40430-015-0309-5

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