elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Impressum | Datenschutz | Kontakt | English
Schriftgröße: [-] Text [+]

Reducing the Demand of Coolant at the Sidewall of a High Pressure Turbine Cascade by Means of Slot Width Modulation

Woopen, Michael und Dannhauer, Axel und Gieß, Peter-Anton (2012) Reducing the Demand of Coolant at the Sidewall of a High Pressure Turbine Cascade by Means of Slot Width Modulation. ASME, Turbo Expo 2012, 2012-06-11 - 2012-06-15, Kopenhagen, Dänemark. doi: 10.1115/GT2012-68325.

Dieses Archiv kann nicht den Volltext zur Verfügung stellen.

Kurzfassung

Within the framework of the German research project AGTurbo the influence of slot flows associated with cooling configurations were investigated experimentally. One interesting result of this work was the severe enhancement of the horse shoe vortex by the coolant dependent on the slot’s position and the ejected mass. Based on these results, further promising film cooling configurations with slot ejection were investigated numerically. Setting up the numerical studies was a challenging task since a very detailed model of the slot, the supply cavity, and the supply tubes had to be generated. Tests proved that smallest deviations against the experiment resulted in completely different flow structures. Nevertheless, the secondary flow structure as well as the aerodynamic parameters could be modeled excellently. According to the velocity field in front of a plane turbine cascade, higher wall pressure arises upstream of the leading edge region of the blades while the pressure drops to a minimum in the center of the passage. To avoid excessive ejection of coolant in the low pressure region the reduction of the local slot area is an appropriate method to decrease the slot mass flow in this particular area. An iterative method is introduced considering the desired mass flow rate and the prevailing total pressure in order to calculate the slot area and to avoid reverse flow. The variation of the film cooling effectiveness indicates a very uniform distribution of cooling air behind the slot which persists within the passage.

elib-URL des Eintrags:https://elib.dlr.de/76986/
Dokumentart:Konferenzbeitrag (NICHT SPEZIFIZIERT)
Titel:Reducing the Demand of Coolant at the Sidewall of a High Pressure Turbine Cascade by Means of Slot Width Modulation
Autoren:
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID-iDORCID Put Code
Woopen, MichaelDLR, AT-TU, jetzt RWTH AachenNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Dannhauer, AxelDLR, AT-TUNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Gieß, Peter-AntonDLR, AT-TUNICHT SPEZIFIZIERTNICHT SPEZIFIZIERT
Datum:Juni 2012
Open Access:Nein
Gold Open Access:Nein
In SCOPUS:Nein
In ISI Web of Science:Nein
DOI:10.1115/GT2012-68325
Status:veröffentlicht
Stichwörter:high pressure turbine, endwall cooling concepts, heat transfer, film cooling effectiveness, computational fluid dynamics
Veranstaltungstitel:ASME, Turbo Expo 2012
Veranstaltungsort:Kopenhagen, Dänemark
Veranstaltungsart:internationale Konferenz
Veranstaltungsbeginn:11 Juni 2012
Veranstaltungsende:15 Juni 2012
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Luftfahrt
HGF - Programmthema:Antriebe (alt)
DLR - Schwerpunkt:Luftfahrt
DLR - Forschungsgebiet:L ER - Antriebsforschung
DLR - Teilgebiet (Projekt, Vorhaben):L - Turbinentechnologien (alt)
Standort: Göttingen
Institute & Einrichtungen:Institut für Antriebstechnik > Turbine
Hinterlegt von: Giess, Dr.-Ing. Peter-Anton
Hinterlegt am:13 Aug 2012 16:25
Letzte Änderung:24 Apr 2024 19:43

Nur für Mitarbeiter des Archivs: Kontrollseite des Eintrags

Blättern
Suchen
Hilfe & Kontakt
Informationen
electronic library verwendet EPrints 3.3.12
Gestaltung Webseite und Datenbank: Copyright © Deutsches Zentrum für Luft- und Raumfahrt (DLR). Alle Rechte vorbehalten.