elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Contact | Deutsch
Fontsize: [-] Text [+]

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

Gieß, Peter-Anton and 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, pp. 1095-1104. 7th European Conference on Turbomachinery, 2007-03-05 - 2007-03-09, Athens, Greece.

Full text not available from this repository.

Abstract

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.

Document Type:Conference or Workshop Item (Speech)
Title:AN EXPERIMENTAL INVESTIGATION OF AN IMPROVED FILM-COOLING CONFIGURATION AT A TURBINE VANE ENDWALL TO REDUCE THE AMOUNT OF COOLANT
Authors:
AuthorsInstitution or Email of Authors
Gieß, Peter-AntonUNSPECIFIED
Mullaert, ArnoldUNSPECIFIED
Date:March 2007
Journal or Publication Title:7th European Conference on Turbomachinery, Fluid Dynamics and Thermodynamics, 5-9 March 2007, Athens-Greece
Refereed publication:Yes
In ISI Web of Science:Yes
Page Range:pp. 1095-1104
Status:Published
Keywords:Coolant ejection, platform, IR-thermography, heat transfer, film cooling effectiveness, reduced amount of coolant, improved cooling geometry
Event Title:7th European Conference on Turbomachinery
Event Location:Athens, Greece
Event Type:international Conference
Event Dates:2007-03-05 - 2007-03-09
Organizer:National Technical University Athens
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion (old)
HGF - Program Themes:E VG - Combustion and Gas Turbine Technologies (old)
DLR - Research area:Energy
DLR - Program:E VG - Combustion and Gas Turbine Technologies
DLR - Research theme (Project):E - Gasturbine (old)
Location: Göttingen
Institutes and Institutions:Institute of Propulsion Technology > Turbine > Turbine Technologie
Deposited By: Stephanie Klein
Deposited On:15 Feb 2008
Last Modified:27 Apr 2009 14:45

Repository Staff Only: item control page

Browse
Search
Help & Contact
Informationen
electronic library is running on EPrints 3.3.12
Copyright © 2008-2012 German Aerospace Center (DLR). All rights reserved.