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CAD-Based Aerodynamic Optimization of a Compressor Stator Using Conventional and Adjoint-Driven Approaches

[+] Author Affiliations
Ilias Vasilopoulos, Peter Flassig, Marcus Meyer

Rolls-Royce Deutschland, Blankenfelde-Mahlow, Germany

Paper No. GT2017-63199, pp. V02CT47A004; 12 pages
doi:10.1115/GT2017-63199
From:
  • ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition
  • Volume 2C: Turbomachinery
  • Charlotte, North Carolina, USA, June 26–30, 2017
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 978-0-7918-5080-0
  • Copyright © 2017 by Rolls-Royce Deutschland Ltd & Co KG

abstract

This paper presents the results of a CAD-based aerodynamic optimization study conducted on the TU Berlin TurboLab Stator benchmark test case. Two different approaches are examined and compared: a conventional gradient-free optimization process which makes use of 2D and 3D CFD results and constructs a response surface to obtain the optimum solution; and an adjoint-driven optimization workflow, where the derivatives w.r.t. the design parameters are calculated by linking the adjoint surface sensitivity map with the model’s geometric sensitivities. Both methods are applied to the turbomachinery test case, where a multi-objective multi-point problem is considered. Moreover, manufacturing constraints are incorporated in the process chain, which makes the case even more challenging. Since the optimization output is already in CAD format, there is no requirement for a back-to-CAD step and the optimum blade can be straightforwardly manufactured.

Copyright © 2017 by Rolls-Royce Deutschland Ltd & Co KG

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