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Large scale optimization of transonic axial compressor rotor blades

Shahpar, S., Polynkin, A. and Toropov, V. (2008) Large scale optimization of transonic axial compressor rotor blades. In: 49th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. Structures, Structural Dynamics and Materials Conference, 7 - 10 April 2008, Schaumburg, Illinois, USA. Conference Proceeding Series . AIAA .


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[First Paragraphs]

In the present work the Multipoint Approximation Method (MAM) by Toropov et al. (1993) has been applied to the shape optimization of an existing transonic compressor rotor (NASA rotor 37) as a benchmark case. Simulations were performed using the Rolls-Royce plc. PADRAM-HYDRA system (Shahpar and Lapworth 2003, Lapworth and Shahpar 2004) that includes the parameterization of the blade shape, meshing, CFD analysis, postprocessing, and objective/constraints evaluation. The parameterization approach adopted in this system is very flexible but can result in a large scale optimization problem.

For this pilot study, a relatively coarse mesh has been used including around 470,000 nodes. The parameterization was done using 5 engineering blade parameters like axial movement of sections along the engine axis in mm (XCEN), circumferential movements of sections in degrees (DELT), solid body rotation of sections in degrees (SKEW), and leading/trailing edge recambering (LEM0/TEMO) in degrees. The design variables were specified using 6 control points at 0 % (hub), 20%, 40%, 60%, 80%, and 100% (tip) along the span. Thus the total number of independent design variables N was 30. B-spline interpolation was used through the control points to generate smooth design perturbations in the radial direction.

Item Type: Proceedings Paper
Copyright, Publisher and Additional Information: Copyright 2008 by the American Institute of Aeronautics and Astronautics. Reprinted with permission of the American Institute of Aeronautics and Astronautics, Inc
Institution: The University of Leeds
Academic Units: The University of Leeds > Faculty of Engineering (Leeds) > School of Civil Engineering (Leeds)
Depositing User: Ms Caroline Wilson
Date Deposited: 21 Oct 2008 16:46
Last Modified: 06 Jun 2014 07:57
Published Version: http://www.aiaa.org/content.cfm?pageid=2
Status: Published
Publisher: AIAA
Refereed: Yes
URI: http://eprints.whiterose.ac.uk/id/eprint/4765

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