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Numerische und experimentelle Optimierung eines Gasturbinenansaugsystems

Mueller, Christian :
Numerische und experimentelle Optimierung eines Gasturbinenansaugsystems.
[Online-Edition]
TU Darmstadt
[Ph.D. Thesis], (2008)

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Item Type: Ph.D. Thesis
Title: Numerische und experimentelle Optimierung eines Gasturbinenansaugsystems
Language: German
Abstract:

CFD und experimentelle Untersuchung an zwei im Rahmen dieser Dissertation aufgebauten Versuchsständen wurden dazu benutzt das Ansaugsystem einer Gasturbine zu optimieren. Ziel war es zunächst den Druckverlust durch geeignete Kanalführung und verbesserte Kompressoranströmung zu optimieren. Weiterhin wurden Untersuchungen an den Schalldämpfern in Bezug auf Druckverlust und Vibrationsverhalten, wobei verschieden poröse Materialien zum Einsatz kamen. Am Anfang wurden stationäre 2D- und 3D-CFD Modelle aufgesetzt, berechnet und ausgewertet. Weiterhin wurde der Schalldämpfer instationär berechnet um Informationen über die Einwirkung einer so simulierten Vibration auf das Strömungsfeld zu erhalten. Die numerisch eingesetzen Merkmale wurden experimentell erhalten. Das Ergebnis war eine Druckverlustverbesserung um ca 30% im Ansaugsystem. Weiterhin konnten Aussagen gemacht werden die den Einfluss der Porosität des Schalldämpfermaterials auf Druckverlust und Vibrationsverhalten darstellen.

Alternative Abstract:
Alternative AbstractLanguage
CFD and experimental procedures (within two test-rigs which were built-up during the dissertation) were used to investigate the behaviour of a GT air intake system and silencer. The objective was firstly to reduce the pressure loss of the system by means of channel optimisation and compressor inflow redirection. Secondly to examine the silencers in terms of pressure loss and vibration behaviour. Hereby special focus is drawn to the influence of the porous medium on the latter properties. At first of all a numerical model 3D stationary air intake system and of a stationary 2D silencer were created, solved and analysed. Following an unsteady model with a moving mesh was set-up to obtain information of the flow field under simplified simulated vibration. Thirdly a selection of porous foams was studied. The investigations have been undertaken mainly on a numerical basis. Experiments on the other hand were necessary to determine coefficients of the foams for the numerical calculations as input for the solver. The calculations have been done on a porous system to determine loss coefficients and the ability to equalise pressure gradients. The intake pressure loss was reduced by approx. 30%, furthermore some good results were found concerning the package specific pressure loss of a porous medium as well as its cross-flow capability. Out of this, conclusions were drawn of the ability to reduce vibrations in the silencer derived from wake formation and interaction of the two silencer rows and silencers can be optimized in combination with its sound absorbing capability.English
Uncontrolled Keywords: Gasturbine, Silencer, Pressure loss
Alternative keywords:
Alternative keywordsLanguage
Gasturbine, Silencer, Pressure lossEnglish
Classification DDC: 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Divisions: Fachbereich Maschinenbau
Date Deposited: 17 Oct 2008 09:22
Last Modified: 07 Dec 2012 11:53
Official URL: http://elib.tu-darmstadt.de/diss/000949
URN: urn:nbn:de:tuda-tuprints-9491
License: Simple publication rights for ULB
Referees: Klingauf, Prof. Dr.- Uwe and Nordmann, Prof. Dr.- Rainer
Advisors: Stoffel, Prof. Dr.- Bernd and Schiffer, Prof. Dr.- Heinz-Peter
Refereed: 27 June 2007
URI: http://tuprints.ulb.tu-darmstadt.de/id/eprint/949
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