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AN EXPERIMENTAL INVESTIGATION OF AN IMPROVED FILM-COOLING CONFIGURATION AT A TURBINE VANE ENDWALL TO REDUCE THE AMOUNT OF COOLANT

Gieß, Peter-Anton und Mullaert, Arnold (2007) AN EXPERIMENTAL INVESTIGATION OF AN IMPROVED FILM-COOLING CONFIGURATION AT A TURBINE VANE ENDWALL TO REDUCE THE AMOUNT OF COOLANT. In: 7th European Conference on Turbomachinery, Fluid Dynamics and Thermodynamics, 5-9 March 2007, Athens-Greece, Seiten 1095-1104. 7th European Conference on Turbomachinery, 2007-03-05 - 2007-03-09, Athens, Greece.

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Kurzfassung

In the Windtunnel for Straight Cascades (EGG) at DLR, Goettingen, thermodynamic investigations were performed applying an improved cooling scheme to establish film cooling at the endwall of a first stage stator. Based on the results from an earlier project the slot position in front of the cascade, as well as the number and the arrangement of the cooling holes within the passage were improved to reduce the necessary amount of coolant. The experiments were carried out at an exit Mach number of 1.0 and at a downstream Reynolds number of 850,000. An infrared camera was used to collect the thermal data of the homogeneous heated endwall, which was appended with electric operated heating foils. The temperature of the coolant flow was adjustable which was necessary for the use of the superposition method. Therefore, the values for heat transfer coefficients and film cooling effectiveness were obtained under similar boundary conditions. The experiments proved the progress in coolant management achieved when applying the new improved cooling configuration instead of the previous one. The slot coolant mass flow rate was more than halved without reducing the film cooling effectiveness. The holes rearranged within the passage close to the pressure side significantly improve platform cooling at a reduced demand of coolant, too.

Dokumentart:Konferenzbeitrag (Vortrag)
Titel:AN EXPERIMENTAL INVESTIGATION OF AN IMPROVED FILM-COOLING CONFIGURATION AT A TURBINE VANE ENDWALL TO REDUCE THE AMOUNT OF COOLANT
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Gieß, Peter-AntonNICHT SPEZIFIZIERT
Mullaert, ArnoldNICHT SPEZIFIZIERT
Datum:März 2007
Erschienen in:7th European Conference on Turbomachinery, Fluid Dynamics and Thermodynamics, 5-9 March 2007, Athens-Greece
Referierte Publikation:Ja
In ISI Web of Science:Ja
Seitenbereich:Seiten 1095-1104
Status:veröffentlicht
Stichwörter:Coolant ejection, platform, IR-thermography, heat transfer, film cooling effectiveness, reduced amount of coolant, improved cooling geometry
Veranstaltungstitel:7th European Conference on Turbomachinery
Veranstaltungsort:Athens, Greece
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:2007-03-05 - 2007-03-09
Veranstalter :National Technical University Athens
HGF - Forschungsbereich:Energie
HGF - Programm:Rationelle Energieumwandlung (alt)
HGF - Programmthema:E VG - Verbrennungs- und Gasturbinentechnik (alt)
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E VG - Verbrennungs- und Gasturbinentechnik
DLR - Teilgebiet (Projekt, Vorhaben):E - Gasturbine (alt)
Standort: Göttingen
Institute & Einrichtungen:Institut für Antriebstechnik > Turbine > Turbinentechnologie
Hinterlegt von: Stephanie Klein
Hinterlegt am:15 Feb 2008
Letzte Änderung:27 Apr 2009 14:45

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