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  4. Schalldämpfung zur Unterdrückung thermoakustischer Instabilitäten unter Brennkammerbedingungen
 
Zitierlink URN
https://nbn-resolving.de/urn:nbn:de:gbv:46-00107509-18

Schalldämpfung zur Unterdrückung thermoakustischer Instabilitäten unter Brennkammerbedingungen

Veröffentlichungsdatum
2019-06-25
Autoren
Ries, Hans-Christoph  
Betreuer
Eigenbrod, Christian  
Gutachter
Herwig, Heinz  
Zusammenfassung
The replacement of the Helmholtz resonators currently used for damping thermoacoustic instabilities in stationary gas turbines by ceramic pore absorbers could improve both the efficiency of combustion and the operating range of the gas turbines. In this thesis, the effect of ceramic pore absorbers on thermoacoustic instabilities in a combustion chamber was experimentally investigated. Their sound absorption properties were calculated simulatively under combustion chamber conditions as well as determined experimentally under normal conditions and at ambient pressure increased to 5 bar. The comparison of the results was used to validate the simulation. Finally, the simulation was used to determine acoustic target parameters under specific operating conditions.
Schlagwörter
Sound absorption

; 

measurement of sound absorption

; 

measurement of acoustic impedance

; 

sound absorption at high pressure

; 

sound absorption at high temperature

; 

thermoacoustics

; 

thermoacoustic instabilities

; 

combustion instabilities

; 

porous ceramic sound absorbers
Institution
Universität Bremen  
Fachbereich
Fachbereich 04: Produktionstechnik, Maschinenbau & Verfahrenstechnik (FB 04)  
Dokumenttyp
Dissertation
Zweitveröffentlichung
Nein
Sprache
Deutsch
Dateien
Lade...
Vorschaubild
Name

00107509-1.pdf

Size

7.51 MB

Format

Adobe PDF

Checksum

(MD5):473b4492802a45078e7906c258bea8ce

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