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INFLUENCE OF COOLING ON THE TRANSITION LOCATION IN A STRAIGHT HIGH PRESSURE TURBINE CASCADE

Petersen, Anna (2017) INFLUENCE OF COOLING ON THE TRANSITION LOCATION IN A STRAIGHT HIGH PRESSURE TURBINE CASCADE. In: 12th European Conference on Turbomachinery Fluid Dynamics and Thermodynamics, ETC 2017. Proceedings of 12th European Conference on Turbomachinery Fluid dynamics & Thermodynamics, 3.-7. April 2017, Stockholm, Sweden. DOI: 10.29008/ETC2017-155

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Abstract

This paper presents experimental investigations of a straight high pressure turbine cascade with main focus on the transition location. The design of the turbine blade intends to stabilize the boundary layer in the acceleration region to achieve a laminar boundary layer at the shockwave boundary layer interaction. The indispensable usage of film cooling in a high pressure turbine upstream of the interaction zone can influence this flow regime. The experimental investigations were performed at the Wind Tunnel for Straight Cascades (EGG), G¨ottingen. The investigations were conducted at different Mach numbers and coolant mass flow ratios. Presented are results of infrared and hotfilm-sensor measurements to detect the boundary layer state. The flow field is shown by applying Schlieren technique, pressure taps and unsteady pressure sensitive paint. The results of this investigation will reveal the influence of the cooling on the transition location with respect to different Mach numbers.

Item URL in elib:https://elib.dlr.de/113344/
Document Type:Conference or Workshop Item (Speech)
Title:INFLUENCE OF COOLING ON THE TRANSITION LOCATION IN A STRAIGHT HIGH PRESSURE TURBINE CASCADE
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Petersen, Annaanna.petersen (at) dlr.dehttps://orcid.org/0000-0003-4819-4994
Date:2017
Journal or Publication Title:12th European Conference on Turbomachinery Fluid Dynamics and Thermodynamics, ETC 2017
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
DOI :10.29008/ETC2017-155
Status:Accepted
Keywords:Turbine cascade, transition, film cooling, infrared imaging, hotfilm anemometry, Schlierentechnique
Event Title:Proceedings of 12th European Conference on Turbomachinery Fluid dynamics & Thermodynamics
Event Location:Stockholm, Sweden
Event Type:international Conference
Event Dates:3.-7. April 2017
Organizer:ETC12
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:propulsion systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Turbine Technologies
Location: Göttingen
Institutes and Institutions:Institute of Propulsion Technology > Turbine
Deposited By: Petersen, Anna
Deposited On:24 Jul 2017 11:08
Last Modified:10 Apr 2018 15:21

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