Since Oehlert et al. (2007, “Exploratory Experiments on Machined Riblets for 2-D Compressor Blades,” Proceedings of International Mechanical Engineering Conference and Exposition 2007, Seattle, WA, IMECE2007-43457), significant improvements in the manufacturing processes of riblets by laser structuring and grinding have been achieved. In the present study, strategies for manufacturing small-scale grooves with a spacing smaller than 40 μm by metal bonded grinding wheels are presented. For the laser-structuring process, significant improvements of the production time by applying diffractive optical elements were achieved. Finally, strategies for evaluating the geometrical quality of the small-scale surface structures are shown and results obtained with two different measuring techniques (SEM and confocal microscope) are compared with each other. The aerodynamic impact of the different manufacturing processes is investigated based upon skin friction reduction data obtained on flat plates as well as the profile-loss reduction of riblet-structured compressor blades measured in a linear cascade wind tunnel. Numerical simulations with MISES embedded in a Monte Carlo simulation (MCS) were performed in order to calculate the profile-loss reduction of a blade structured by grinding to define further improvements of the riblet-geometry. A numerical as well as experimental study quantifying the relevant geometrical parameters indicate how further improvements from the present 4% reduction in skin friction can be achieved by an additional decrease of the riblet tip diameter and a more trapezoidal shape of the groove in order to realize the 8% potential reduction.
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July 2013
Research-Article
Recent Advances in Manufacturing of Riblets on Compressor Blades and Their Aerodynamic Impact
Berend Denkena,
Berend Denkena
Professor
e-mail: Denkena@ifw.uni-hannover.de
e-mail: Denkena@ifw.uni-hannover.de
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Thomas Krawczyk,
Thomas Krawczyk
Research Assistant
e-mail: Krawczyk@ifw.uni-hannover.de
Institute of Production Engineering
and Machine Tools,
Leibniz Universitaet Hannover,
30823 Garbsen, Germany
e-mail: Krawczyk@ifw.uni-hannover.de
Institute of Production Engineering
and Machine Tools,
Leibniz Universitaet Hannover,
30823 Garbsen, Germany
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Rainer Kling,
Rainer Kling
Business Unit Manager Laser Micromachining
Centre Technologique ALPhANOV,
33405 Talence,
e-mail: rainer.kling@alphanov.com
Centre Technologique ALPhANOV,
33405 Talence,
France
e-mail: rainer.kling@alphanov.com
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Ludger Overmeyer,
Ludger Overmeyer
Professor
e-mail: ludger.overmeyer@ita.uni-hannover.de
e-mail: ludger.overmeyer@ita.uni-hannover.de
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Eduard Reithmeier,
Eduard Reithmeier
Professor
e-mail: sekretariat@imr.uni-hannover.de
e-mail: sekretariat@imr.uni-hannover.de
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Renke Scheuer,
Renke Scheuer
Research Assistant
e-mail: renke.scheuer@imr.uni-hannover.de
e-mail: renke.scheuer@imr.uni-hannover.de
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Taras Vynnyk,
Taras Vynnyk
Group Leader Industrial and Medical Imaging
e-mail: taras.vynnyk@imr.uni-hannover.de
Leibniz Universitaet Hannover,
e-mail: taras.vynnyk@imr.uni-hannover.de
Institute of Measurement and Automatic Control
,Leibniz Universitaet Hannover,
30167 Hannover
, Germany
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Joerg R. Seume
Joerg R. Seume
Senior Member ASME
Professor
Leibniz Universitaet Hannover,
e-mail: Seume@tfd.uni-hannover.de
Professor
Institute of Turbomachinery and Fluid Dynamics
,Leibniz Universitaet Hannover,
30167 Hannover
, Germany
e-mail: Seume@tfd.uni-hannover.de
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Christoph Lietmeyer
Berend Denkena
Professor
e-mail: Denkena@ifw.uni-hannover.de
e-mail: Denkena@ifw.uni-hannover.de
Thomas Krawczyk
Research Assistant
e-mail: Krawczyk@ifw.uni-hannover.de
Institute of Production Engineering
and Machine Tools,
Leibniz Universitaet Hannover,
30823 Garbsen, Germany
e-mail: Krawczyk@ifw.uni-hannover.de
Institute of Production Engineering
and Machine Tools,
Leibniz Universitaet Hannover,
30823 Garbsen, Germany
Rainer Kling
Business Unit Manager Laser Micromachining
Centre Technologique ALPhANOV,
33405 Talence,
e-mail: rainer.kling@alphanov.com
Centre Technologique ALPhANOV,
33405 Talence,
France
e-mail: rainer.kling@alphanov.com
Ludger Overmeyer
Professor
e-mail: ludger.overmeyer@ita.uni-hannover.de
e-mail: ludger.overmeyer@ita.uni-hannover.de
Bodo Wojakowski
Eduard Reithmeier
Professor
e-mail: sekretariat@imr.uni-hannover.de
e-mail: sekretariat@imr.uni-hannover.de
Renke Scheuer
Research Assistant
e-mail: renke.scheuer@imr.uni-hannover.de
e-mail: renke.scheuer@imr.uni-hannover.de
Taras Vynnyk
Group Leader Industrial and Medical Imaging
e-mail: taras.vynnyk@imr.uni-hannover.de
Leibniz Universitaet Hannover,
e-mail: taras.vynnyk@imr.uni-hannover.de
Institute of Measurement and Automatic Control
,Leibniz Universitaet Hannover,
30167 Hannover
, Germany
Joerg R. Seume
Senior Member ASME
Professor
Leibniz Universitaet Hannover,
e-mail: Seume@tfd.uni-hannover.de
Professor
Institute of Turbomachinery and Fluid Dynamics
,Leibniz Universitaet Hannover,
30167 Hannover
, Germany
e-mail: Seume@tfd.uni-hannover.de
Contributed by International Gas Turbine Institute (IGTI) of ASME for publication in the Journal of Turbomachinery. Manuscript received July 10, 2012; final manuscript received August 10, 2012; published online June 3, 2013. Assoc. Editor: David Wisler.
J. Turbomach. Jul 2013, 135(4): 041008 (12 pages)
Published Online: June 3, 2013
Article history
Received:
July 10, 2012
Revision Received:
August 10, 2012
Citation
Lietmeyer, C., Denkena, B., Krawczyk, T., Kling, R., Overmeyer, L., Wojakowski, B., Reithmeier, E., Scheuer, R., Vynnyk, T., and Seume, J. R. (June 3, 2013). "Recent Advances in Manufacturing of Riblets on Compressor Blades and Their Aerodynamic Impact." ASME. J. Turbomach. July 2013; 135(4): 041008. https://doi.org/10.1115/1.4007590
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