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Influence of a Hub-Groove on the Unsteady Losses of a Transonic Compressor Stage

Rochhausen, Stefan and Kröger, Georg and Nicke, Eberhard and Stollenwerk, Stefan (2010) Influence of a Hub-Groove on the Unsteady Losses of a Transonic Compressor Stage. STAB 2010, 09.-10.Nov.2010, Berlin, Deutschland.

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Abstract

In this paper the influence of a non-symmetrical sidewall-contour on the flow field of an axial compressor is investigated. In earlier studies, carried out at the DLR Institute of Propulsion Technology in Cologne, it has been shown that it is possible to influence secondary flow regimes by a non-symmetrical sidewall contour. With the help of the contour a vortex is generated that serves as an aerodynamic barrier and thus reduces the flow transport orthogonal to the main flow direction. In this paper the described method of flow manipulation is investigated for the compressor rotor at the hub wall. It turns out that despite the unsteady inflow conditions the vortex is stably generated and works as an aerodynamic separator. The rotor hub region increases its flow capacity. A higher pressure ratio is achieved at a highly loaded operating point. The efficiency at this point remains unchanged.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Influence of a Hub-Groove on the Unsteady Losses of a Transonic Compressor Stage
Authors:
AuthorsInstitution or Email of Authors
Rochhausen, Stefanstefan.rochhausen@dlr.de
Kröger, GeorgUNSPECIFIED
Nicke, EberhardUNSPECIFIED
Stollenwerk, StefanUNSPECIFIED
Date:November 2010
Status:Published
Keywords:non-symmetrical sidewall contouring axial compressor rotor
Event Title:STAB 2010
Event Location:Berlin, Deutschland
Event Type:national Conference
Event Dates:09.-10.Nov.2010
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: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Numerical Methodes
Deposited By: Stefan Rochhausen
Deposited On:21 May 2012 14:33
Last Modified:12 Dec 2013 21:38

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