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Multiobjective Optimization for Duct and Strut Design of an Annular Exhaust Diffuser

Schaefer, Philipp and Hofmann, Willy and Gieß, Peter-Anton (2012) Multiobjective Optimization for Duct and Strut Design of an Annular Exhaust Diffuser. ASME Turbo Expo 2012, 11. - 15. Juni, 2012, Copenhagen, Denmark.

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Abstract

This paper describes the aerodynamic optimization of a typical exhaust diffuser for a heavy duty gas turbine. The objective is to maximize diffuser performance and, in this way, pressure recovery by optimizing the geometry for two given inlet conditions. To validate and adjust the numerical set-up, experimental data from measurements on the test model is used. The numerical results obtained by using TRACE compares with the experimental results. An optimization process is applied using the framework AutoOpti developed by DLR, which combines evolutionary strategies with surrogate models in order to select optimal geometric parameters. Finally, the differences between the baseline and several optimized designs are discussed and the impact of different parameters on diffuser performance is demonstrated.

Item URL in elib:https://elib.dlr.de/76982/
Document Type:Conference or Workshop Item (Paper)
Title:Multiobjective Optimization for Duct and Strut Design of an Annular Exhaust Diffuser
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schaefer, PhilippDLR, AT-TUUNSPECIFIED
Hofmann, WillyAlstom, Baden, SchweizUNSPECIFIED
Gieß, Peter-AntonDLR, AT-TUUNSPECIFIED
Date:June 2012
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:multiobjective optimization, exhaust diffusor, heavy duty gas turbine, numerical investigation, duct and strut design
Event Title:ASME Turbo Expo 2012
Event Location:Copenhagen, Denmark
Event Type:international Conference
Event Dates:11. - 15. Juni, 2012
Organizer:AMSE
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion (old)
HGF - Program Themes:E VG - Combustion and Gas Turbine Technologies (old)
DLR - Research area:Energy
DLR - Program:E VG - Combustion and Gas Turbine Technologies
DLR - Research theme (Project):E - Gasturbine (old)
Location: Göttingen
Institutes and Institutions:Institute of Propulsion Technology > Turbine
Deposited By: Giess, Dr.-Ing. Peter-Anton
Deposited On:13 Aug 2012 16:12
Last Modified:13 Aug 2012 16:12

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