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Research on Hot Stream Liners for Acoustic Damping at DLR

Bake, F. (2012) Research on Hot Stream Liners for Acoustic Damping at DLR. In: Proceedings of the ASME Turbo Expo 2012, Vol 5. ASME Turbo Expo 2012: Power for Land, Sea and Air; Panel Session on "Combustion Dynamics Integrated with Structures: Aero Excitations & Damping, 2012-06-11 - 2012-06-15, Copenhagen, Denmark.

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Kurzfassung

Thermoacoustic instabilities remain of great concern for the design of modern gas turbine combustors, especially due to the application of lean burn concepts, the need for fuel flexibility, and a wide operating range with respective safety margins. Combustor oscillations can cause severe damage to the combustor itself and adjacent components. Thus, gas turbine manufacturers – which includes both aero-engines and industrial gas turbines – have developed a range of concepts and devices in order to avoid, suppress, or reduce these instabilities. One of those concepts applicable for gas turbine combustors relies on the damping of the occurring pressure fluctuations in order to weaken the coupling with the unsteady heat release to suppress the instability growth. Since most of the current combustors need some dilution and cooling air somewhere downstream of the primary combustion zone, the feeding system for this secondary air could be designed in a way to provide appropriate damping for the pressure fluctuations as well. Here, the research activity of the s at the German Aerospace Center (DLR) in the field of damping liners, especially for hot stream application, is presented. The results of extensive experimental studies on the influence of the various liner parameters like for instance perforation ratio, bias flow and cavity design will be shown. Since the liner design for real engine application requires also the damping dependencies on pressure and temperature, the DLR Department of Engine Acoustics built up a new test facility, the Hot-Acoustic-Testrig (HAT). This testrig allows the investigation of damping characteristics and cooling performance of hot stream liner segments. The features of this test facility will be explained in detail.

elib-URL des Eintrags:https://elib.dlr.de/80198/
Dokumentart:Konferenzbeitrag (Vortrag)
Titel:Research on Hot Stream Liners for Acoustic Damping at DLR
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Bake, F.NICHT SPEZIFIZIERTNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:2012
Erschienen in:Proceedings of the ASME Turbo Expo 2012, Vol 5
Referierte Publikation:Ja
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Ja
Status:veröffentlicht
Stichwörter:Acoustic damping, combustion noise, HAT, liner, bias flow liner
Veranstaltungstitel:ASME Turbo Expo 2012: Power for Land, Sea and Air; Panel Session on "Combustion Dynamics Integrated with Structures: Aero Excitations & Damping
Veranstaltungsort:Copenhagen, Denmark
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:11 Juni 2012
Veranstaltungsende:15 Juni 2012
HGF - Forschungsbereich:Energie, Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Rationelle Energieumwandlung und Nutzung (alt), Luftfahrt
HGF - Programmthema:Kraftwerkstechnik (alt), Antriebe (alt)
DLR - Schwerpunkt:Energie, Luftfahrt
DLR - Forschungsgebiet:E VG - Verbrennungs- und Gasturbinentechnik, L ER - Antriebsforschung
DLR - Teilgebiet (Projekt, Vorhaben):E - Gasturbine (alt), L - Brennkammertechnologien (alt)
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Antriebstechnik > Triebwerksakustik
Hinterlegt von: Kaur, Balbir
Hinterlegt am:10 Jan 2013 11:54
Letzte Änderung:24 Apr 2024 19:46

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