Research Papers

Recent Advances in Manufacturing of Riblets on Compressor Blades and Their Aerodynamic Impact

[+] Author and Article Information
Christoph Lietmeyer

Test Engineer
Volkswagen AG, 38436 Wolfsburg, Germany
e-mail: Christoph.Lietmeyer@volkswagen.de

Berend Denkena

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

Rainer Kling

Business Unit Manager Laser Micromachining
Centre Technologique ALPhANOV,
33405 Talence, France
e-mail: rainer.kling@alphanov.com

Ludger Overmeyer

e-mail: ludger.overmeyer@ita.uni-hannover.de

Bodo Wojakowski

Research Assistant
e-mail: b.wojakowski@lzh.de
Laser Zentrum Hannover e.V.,
30419 Hannover, Germany

Eduard Reithmeier

e-mail: sekretariat@imr.uni-hannover.de

Renke Scheuer

Research Assistant
e-mail: renke.scheuer@imr.uni-hannover.de

Taras Vynnyk

Group Leader Industrial and Medical Imaging
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
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 135(4), 041008 (Jun 03, 2013) (12 pages) Paper No: TURBO-12-1136; doi: 10.1115/1.4007590 History: Received July 10, 2012; Revised August 10, 2012

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.

Copyright © 2013 by ASME
Your Session has timed out. Please sign back in to continue.


Gümmer, V., (2005), “Pfeilung und V-Stellung zur Beeinflussung der Dreidimensionalen Strömung in Leiträdern Transsonischer Axialverdichter, “Fortschritt-Berichte VDI Reihe 7 Nr. 384, VDI Verlag, Düsseldorf.
Reif, W.-E., 1985, Squamation and Ecology of Sharks (Courier Forschungsinstitut Senckenberg), Vol. 78, Schweizerbart Science Publishers, Stuttgart, Germany.
Walsh, M. J., 1983, “Turbulent Boundary Layer Drag Reduction Using Riblets,” AIAA Paper No. 1982-0169.
Bechert, D. W., Bruse, M., Hage, W., van der Hoeven, J. G. T., and Hoppe, G., 1997, “Experiments on Drag-Reducing Surfaces and Their Optimization With an Adjustable Geometry,” J. Fluid Mech., 338, pp. 59–87. [CrossRef]
Oehlert, K., and Seume, J., 2006, “Exploratory Experiments on Machined Riblets on Compressor Blades,” Proc. of 2nd Joint U.S.-European Fluids Engineering Division Summer Meeting, Miami, FL, July 17–20, ASME Paper No. FEDSM2006-98093, pp. 415–424. [CrossRef]
Oehlert, K.Seume, J.Siegel, F.Ostendorf, A.Wang, B.; Denkena, B.Vynnyk, T.Reithmeier, E.Hage, W.Knobloch, K., and Meyer, R., 2007, “Exploratory Experiments on Machined Riblets for 2-D Compressor Blades,” Proceedings of International Mechanical Engineering Conference and Exposition (IMECE2007), Seattle, WA, November 11–15, ASME Paper No. IMECE2007-43457. pp. 25–39. [CrossRef]
Denkena, B., Koehler, J., and Wang, B., 2010, “Manufacturing of Functional Riblet Structures by Profile Grinding,” CIRP J. Man. Sci. Tech, 3, pp. 14–26. [CrossRef]
Siegel, F., Klug, U., and Kling, R., 2009, “Extensive Micro-Structuring of Metals Using Picosecond Pulses—Ablation Behavior and Industrial Relevance,” J. Laser Micro. Nanoeng., 4, pp. 104–110. [CrossRef]
Lietmeyer, C., Oehlert, K., and SeumeJ. R., 2011, “Optimal Application of Riblets on Compressor Blades and Their Contamination Behaviour,” Proceedings of ASME Turbo Expo 2011, Vancouver, Canada, June 6–10, ASME Paper No. GT2011-46855, pp. 443–455. [CrossRef]
Klocke, F., Klink, A., and Schneider, U, 2007, “Electrochemical Oxidation Analysis for Dressing Bronze-Bonded Diamond Grinding Wheels,” Prod. Engineer., 1(2), pp. 141–148. [CrossRef]
Denkena, B., Reichstein, M., and Hahmann, D., 2006, “Electro Contact Discharge Dressing for Micro-Grinding,” Proceedings of the 6th euspen International Conference, Baden, Austria, May 28–June 1, Paper No. P7.22, pp. 92–95.
Zaeh, M. F., Brinksmeier, E., Heinzel, C., Huntemann, J. W., and Föckerer, T, 2009, “Experimental and Numerical Identification of Process Parameters of Grind-Hardening and Resulting Part Distortions,” Prod. Engineer., 3(3), pp. 271–279. [CrossRef]
Golub, M., 2004, “Laser Beam Splitting by Diffractive Optics,” Opt. Photonics News, 15(2), pp. 36–41. [CrossRef]
Siegel, F., 2011, “Abtragen metallischer Werkstoffe mit Pikosekunden-Laserpulsen für Anwendungen in der Strömungsmechanik,” dissertation, Berichte aus dem LZH, Band 02/2011.
Wojakowski, B., Klug, U., and Kling, R., 2011, “Large-Area Production of Dynamically Scaled Micrustructures Using Diffractive Optical Elements,” Proceedings of International Congress on Applications of Lasers and Electro-Optics (ICALEO) 2011, Orlando, FL, October 23–27, Paper No. M603.
Vynnyk, T., 2010, “REM-Topografiemessungen an Mikro- und Nanostrukturierten Oberflächen,” dissertation, Leibniz Universität Hannover, Hannover, Germany.
Hage, W., and Bechert, D. W., 2001, “Rib Tip Sharpness: A Key Issue for Riblet Application,” Interner Bericht, DLR-IB 92517-01/B7.
Drela, M., and Giles, M. B., 1987, “Viscous-Inviscid Analysis of Transonic and Low Reynolds Number Airfoils,” AIAA J., 25(10), pp. 1347–1355. [CrossRef]
Lietmeyer, C., Chahine, C., and Seume, J. R., 2011, “Numerical Calculation of the Riblet-Effect on Compressor Blades and Validation With Experimental Results,” Proceedings of International Gas Turbine Congress (IGTC 2011), Osaka, Japan, November 13–18, Paper No. IGTC2011-0106.


Grahic Jump Location
Fig. 5

Aspect ratio of ground riblets

Grahic Jump Location
Fig. 4

Wear behavior over the grinding length for different vf and ae

Grahic Jump Location
Fig. 7

Principle of three spot ablation using beam splitting DOE; the effective spot-to-spot distance is determined by the rotation angle of the DOE

Grahic Jump Location
Fig. 8

Simulated lanewise scanning pattern using a three sport DOE: two lanes are set side by side using three different riblet spacings (from top to bottom).

Grahic Jump Location
Fig. 3

Microprofiles on the grinding wheel

Grahic Jump Location
Fig. 10

Intensity distribution through the image stack for different samples

Grahic Jump Location
Fig. 1

Riblet geometries ground by vitrified bonded grinding wheels

Grahic Jump Location
Fig. 12

Elimination of the stochastic parts

Grahic Jump Location
Fig. 6

Principal setup for laser machining. The multiaxis translation system positions the area of interest of the blades into the focal plane of the lens, while the scanner deflects the laser beam at high speed.

Grahic Jump Location
Fig. 9

Magnified confocal microscope image of a smooth parameter set transition from 38 μm to 33 μm riblet spacings. The gray arrow marks a beginning bifurcation.

Grahic Jump Location
Fig. 11

Results of bilinear interpolation (top) and interpolation based on Delaunay triangulation

Grahic Jump Location
Fig. 16

Wall shear-stress reduction of ground and laser-structured riblets in comparison to riblets with an ideal shape (experimental data measured by the German Aerospace Center, Institute of Propulsion Technology, Engine Acoustics Department); curves obtained by polynomial interpolation; σ = ±0.3%

Grahic Jump Location
Fig. 17

Representative cross sections of ground and laser-structured riblets in comparison to the ideal geometry with a trapezoidal groove

Grahic Jump Location
Fig. 18

Comparison of measured and calculated wall shear-stress reduction for ideal riblets; error bars indicate the standard deviation σ

Grahic Jump Location
Fig. 19

Comparison of measured and calculated wall shear-stress reduction for ground riblets; error bars indicate the standard deviation σ

Grahic Jump Location
Fig. 20

Probability density functions of geometric parameters of a ground riblet structure on a NACA 6510 compressor blade (measured by IMR)

Grahic Jump Location
Fig. 15

Evaluation of the riblets radii using SEM

Grahic Jump Location
Fig. 21

Ant-hill-plots of profile-loss reduction

Grahic Jump Location
Fig. 22

Pie chart of profile-loss reduction



Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In