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MULTIDISCIPLINARY 3D-OPTIMIZATION OF A FAN STAGE PERFORMANCE MAP WITH CONSIDERATION OF THE STATIC AND DYNAMIC ROTOR MECHANICS

Siller, Ulrich and Aulich, Marcel (2010) MULTIDISCIPLINARY 3D-OPTIMIZATION OF A FAN STAGE PERFORMANCE MAP WITH CONSIDERATION OF THE STATIC AND DYNAMIC ROTOR MECHANICS. ASME Turbo Expo 2010: Power for Land, Sea and Air, 14.-18. Juni, 2010, Glasgow, UK.

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Abstract

Achievement of an optimal compressor design with respect to its aerodynamic performance and feasible structural mechanics within an automated optimization process is subject of this paper. The compressor considered is a highly loaded, transonic fan stage, designed for achievement of a very high pressure ratio. To ensure operation in highly integrated installation conditions, a sufficient stability margin is of major concern. Multiple aerodynamic operating points at two rotational speeds allowed optimization of both the stability margin and the working line stage efficiency. On the part of structural mechanics, several static stress criteria were addressed for definite blade regions as well as the dynamic blade behavior in terms of the Campbell diagram. An optimization strategy was chosen, which targeted firstly on the fulfillment of multiple mechanical and aerodynamical constraints, while the aerodynamic performance was under constraint itself. Upon achievement, optimization aimed for maximum aerodynamic performance while keeping mechanics feasible. Response surfaces have been incorporated in the optimization process to reconcile costly high fidelity CFD and structural simulations with the large number of 114 free design parameters. Furthermore, optimization on these models enabled a successfully accomplishment of the constraint issue by a large number of numerically cheaper fitness evaluations. Starting from an already optimized baseline configuration, the current work targeted an improvement of the rotor aerodynamics in the transonic hub region and the resolution of previously unsolved problems concerning the rotor structural mechanics. Free design parameters were hub and casing contours in the rotor part, the shape of the leading and trailing blade edges and a high degree of freedom for rotor profile sections in the lower half of the blade.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:MULTIDISCIPLINARY 3D-OPTIMIZATION OF A FAN STAGE PERFORMANCE MAP WITH CONSIDERATION OF THE STATIC AND DYNAMIC ROTOR MECHANICS
Authors:
AuthorsInstitution or Email of Authors
Siller, Ulrichulrich.siller@dlr.de
Aulich, Marcelmarcel.aulich@dlr.de
Date:2010
Status:Published
Keywords:transonic transsonisch compressor verdichter fan optimization optimisation optimierung kennfeld campbell-diagram rotor mechanics
Event Title:ASME Turbo Expo 2010: Power for Land, Sea and Air
Event Location:Glasgow, UK
Event Type:international Conference
Event Dates:14.-18. Juni, 2010
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Propulsion Systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Fan and Compressor Technologies
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Fan and Compressor
Deposited By: Georg Ulrich Siller
Deposited On:23 Aug 2010 09:40
Last Modified:23 Aug 2010 09:40

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