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Endwall Contouring and FilletmDesign for Reducing Losses and Homogenizing the Outflow of a Compressor Cascade

Reutter, Oliver and Hemmert-Pottmann, Stefan and Hergt, Alexander and Nicke, Eberhard (2014) Endwall Contouring and FilletmDesign for Reducing Losses and Homogenizing the Outflow of a Compressor Cascade. In: ASME Turbo Expo 2104. ASME. ASME Turbo Expo, 16.-20.Jun.2014, Dlandüsseldorf, Deutsch.

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Abstract

The following paper deals with the development of an optimized fillet and an endwall contour for reducing the total pressure loss and for homogenizing the outflow of a highly loaded cascade with a low aspect ratio. The NACA-65 K48 cascade profile without a fillet and without endwall contouring is used as a basis. Optimizations are performed using the DLR in-house tool AutoOpti and the RANS-solver TRACE. Three operating points at an inflow Mach number of 0.67 with different inflow angles are used to secure a wide operating range of the optimized design. At first only a fillet is optimized. The optimized fillet is small at the leading edge and rather high, wide and thick towards the trailing edge. It reduces the total pressure loss and homogenizes the outflow up to a blade height of 20 %. Following this a combined optimization of the endwall and the fillet is performed. The optimized contour leads to the development of a vortex, which changes the secondary flow in such a way, that the corner separation is reduced, which in turn significantly reduces the total pressure loss up to 16 % in the design operating point. The contour in the outflow region leads to a significant homogenization of the outflow in the near wall region.

Item URL in elib:https://elib.dlr.de/90605/
Document Type:Conference or Workshop Item (Speech)
Title:Endwall Contouring and FilletmDesign for Reducing Losses and Homogenizing the Outflow of a Compressor Cascade
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Reutter, Oliveroliver.reutter (at) dlr.deUNSPECIFIED
Hemmert-Pottmann, Stefanstefan.hemmert-pottmann (at) dlr.deUNSPECIFIED
Hergt, Alexanderalexander.hergt (at) dlr.deUNSPECIFIED
Nicke, Eberhardeberhard.nicke (at) dlr.deUNSPECIFIED
Date:16 June 2014
Journal or Publication Title:ASME Turbo Expo 2104
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Publisher:ASME
Status:Published
Keywords:turbomachinery, compressor,endwall, contouring,shaping,optimization,cascade,cfd,angle homogenization
Event Title:ASME Turbo Expo
Event Location:Dlandüsseldorf, Deutsch
Event Type:international Conference
Event Dates:16.-20.Jun.2014
Organizer:ASME
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 - Fan and Compressor Technologies
Location: Köln-Porz
Institutes and Institutions:Institute of Propulsion Technology > Fan and Compressor
Deposited By: Reutter, Oliver
Deposited On:16 Sep 2014 15:05
Last Modified:16 Sep 2014 15:05

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