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INVESTIGATIONS AT THE OVER-TIP CASING OF A HIGH PRESSURE TURBINE INCLUDING OFF-DESIGN CONDITIONS AND HEAT TRANSFER CORRELATIONS

v. Duikeren, Bart and Heselhaus, Anderas (2008) INVESTIGATIONS AT THE OVER-TIP CASING OF A HIGH PRESSURE TURBINE INCLUDING OFF-DESIGN CONDITIONS AND HEAT TRANSFER CORRELATIONS. ASME Turbo Expo, 9. - 13. Juni 2008, Berlin, Deutschland.

Full text not available from this repository.

Abstract

Turbine inlet temperature is reaching values far above acceptable material temperatures. Thus the thermally highly loaded components have to be cooled intensively. One of the most thermally loaded components is the over-tip casing. In recent years research on heat transfer at the over-tip casing received a big boost by availability of faster and more accurate measurement techniques. So far the investigations are limited to design condition, no information is available at offdesign conditions. This paper aims to contribute to a better understanding of the major phenomena governing heat transfer in the over-tip casing region, including the influence of different operating conditions. Using an HP-turbine at different flow conditions, extended measurements were performed at DLR’s wind tunnel for Rotating Cascades (RGG), Göttingen, including the flow field in the tip gap and close to the over-tip casing. The Nusselt correlation for a flat plate was investigated for it’s applicability to the over-tip casing. The influence of the incidence angle on the heat transfer levels at the upstream part of the over-tip casing is investigated. Also the influence of the rotational speed on tip-leakage flow and casing heat transfer will be discussed. These results are compared to flat plate heat transfer correlations for design and off-design conditions.

Item URL in elib:https://elib.dlr.de/83088/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:INVESTIGATIONS AT THE OVER-TIP CASING OF A HIGH PRESSURE TURBINE INCLUDING OFF-DESIGN CONDITIONS AND HEAT TRANSFER CORRELATIONS
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
v. Duikeren, BartAT-TUUNSPECIFIED
Heselhaus, AnderasSiemens PGUNSPECIFIED
Date:2008
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:heat transfer, over-tip casing, correlations
Event Title:ASME Turbo Expo
Event Location:Berlin, Deutschland
Event Type:international Conference
Event Dates:9. - 13. Juni 2008
HGF - Research field:Energy
HGF - Program:Efficient Energy Conversion and Use (old)
HGF - Program Themes:Power Plants (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
Deposited By: Giess, Dr.-Ing. Peter-Anton
Deposited On:25 Jun 2013 14:56
Last Modified:25 Jun 2013 14:56

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