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Knowledge Extraction from Aerodynamic Design Data and its Application to 3D Turbine Blade Geometries

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Journal of Mathematical Modelling and Algorithms

Abstract

Applying numerical optimisation methods in the field of aerodynamic design optimisation normally leads to a huge amount of heterogeneous design data. While most often only the most promising results are investigated and used to drive further optimisations, general methods for investigating the entire design dataset are rare. We propose methods that allow the extraction of comprehensible knowledge from aerodynamic design data represented by discrete unstructured surface meshes. The knowledge is prepared in a way that is usable for guiding further computational as well as manual design and optimisation processes. A displacement measure is suggested in order to investigate local differences between designs. This measure provides information on the amount and direction of surface modifications. Using the displacement data in conjunction with statistical methods or data mining techniques provides meaningful knowledge from the dataset at hand. The theoretical concepts have been applied to a data set of 3D turbine stator blade geometries. The results have been verified by means of modifying the turbine blade geometry using direct manipulation of free form deformation (DMFFD) techniques. The performance of the deformed blade design has been calculated by running computational fluid dynamic (CFD) simulations. It is shown that the suggested framework provides reasonable results which can directly be transformed into design modifications in order to guide the design process.

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Authors and Affiliations

  1. Honda Research Institute Europe GmbH, Carl-Legien-Strasse 30, 63073, Offenbach/Main, Germany

    Lars Graening, Stefan Menzel, Martina Hasenjäger, Thomas Bihrer, Markus Olhofer & Bernhard Sendhoff

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  1. Lars Graening
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  2. Stefan Menzel
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  3. Martina Hasenjäger
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  4. Thomas Bihrer
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  5. Markus Olhofer
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  6. Bernhard Sendhoff
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Correspondence to Lars Graening.

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Graening, L., Menzel, S., Hasenjäger, M. et al. Knowledge Extraction from Aerodynamic Design Data and its Application to 3D Turbine Blade Geometries. J Math Model Algor 7, 329–350 (2008). https://doi.org/10.1007/s10852-008-9094-9

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  • DOI: https://doi.org/10.1007/s10852-008-9094-9

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