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Open AccessArticle

Computational Design Optimization for S-Ducts

School of Aerospace, Transport and Manufacturing, Cranfield University, Cranfield MK43 0AL, UK
Department of Industrial Engineering, University of Padova, 35131 Padova, Italy
Author to whom correspondence should be addressed.
Designs 2018, 2(4), 36;
Received: 4 September 2018 / Revised: 22 September 2018 / Accepted: 26 September 2018 / Published: 12 October 2018
(This article belongs to the Special Issue Challenges and Progress in Turbomachinery Design)
In this work, we investigate the computational design of a typical S-Duct that is found in the literature. We model the design problem as a shape optimization study. The design parameters describe the 3D geometrical changes to the shape of the S-Duct and we assess the improvements to the aerodynamic behavior by considering two objective functions: the pressure losses and the swirl. The geometry management is controlled with the Free-Form Deformation (FFD) technique, the analysis of the flow is performed using steady-state computational fluid dynamics (CFD), and the exploration of the design space is achieved using the heuristic optimization algorithm Tabu Search (MOTS). The results reveal potential improvements by 14% with respect to the pressure losses and by 71% with respect to the swirl of the flow. These findings exceed by a large margin the optimality level that was achieved by other approaches in the literature. Further investigation of a range of optimum geometries is performed and reported with a detailed discussion. View Full-Text
Keywords: S-duct design; computational design; stochastic optimization; tabu search; free-form deformation S-duct design; computational design; stochastic optimization; tabu search; free-form deformation
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D’Ambros, A.; Kipouros, T.; Zachos, P.; Savill, M.; Benini, E. Computational Design Optimization for S-Ducts. Designs 2018, 2, 36.

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