Abstract
The effectiveness of gas turbines can be improved significantly by decreasing the friction losses. Compared to smooth surfaces riblet-structures have been proven to reduce skin friction in turbulent flow up to 10 %. For the technical application on compressor blades in turbo machines, micro riblet structures with a riblet width between 20 and 120 μm and a depth of the half width are required. Furthermore, the structuring process must be able to generate micro patterns, which are orientated in stream direction, on free formed surfaces. So far, riblet structures have been ground on single curved NACA6510. In order to grind riblet structures a 5–axes-grinding process is required. However, the complex motion of the grinding wheel results in defects on the ground geometries. This paper presents the effect of the 5-axes-kinematics on the riblet aspect ratio and, as a consequence, general conditions, which enable a grinding process without defects on the ground riblets.
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Gümmer, V.: Pfeilung und V-Stellung zur Beeinflussung der dreidimensionalen Strömung in Leiträdern transsonischer Axialverdichter, Fortschritt-Berichte VDI Reihe 7 Nr. 384, VDI Verlag, Düsseldorf (2005)
Ninnemann, T., Ng, W.-F.: Loss Reduction Using Riblets on a Supersonic Through-flow Fan Blade Cascade. Trans. ASME, Ser. I J. Fluids Eng. 126(4), 642–649 (2004)
Bechert, D.-W., Bartenwerfer, M.: The viscous flow on surfaces with longitudinal ribs. J. Fluid Mech. 206, 105–129 (1989)
Siegel, F., Klug, U., Kling, R., Ostendorf, A.: Extensive micro-structuring of metals using picosecond pulses - ablation behavior and industrial relevance, In: Proceedings of LPM 2008, 9th International Symposium on Laser Precision Manufacturing, 17-20 Juni, Quebec, Canada, (2008)
Fischer, S.: Fertigungssysteme zur spanenden Herstellung von Mikrostrukturen, PhD thesis, RWTH, Aachen (2000)
Weinert, K., Blum, H., Jansen, T., Rademacher, A.: Simulation based optimization of NC-shape grinding process with toroid grinding wheels. Prod. Eng. Res. Dev. (WGP), 1 (3), 245,252, (2007)
Uhlmann, E., Piltz, S., Doll, U.: Funkenerosion in der Mikrotechnik. Einsatzgebiete und Verfahrensgrenzen. Werkstatttechnik wt-online, 12, 733–737 (2004)
Denkena, B., Köhler, J., Wang, B.: Manufacturing of functional riblet structures by profile grinding. CIRP J. Manuf. Sci. Technol. 3(1), 14–26 (2010)
Lietmeyer, C., Denkena, B., Kling, R., Krawczyk, T., Overmeyer, L., Reithmeier, E., Scheuer, R., Vynnyk, T., Wojakowski, B., Seume, J.R.: Recent advances in manufacturing of riblets on compressor blades and their aerodynamic impact. J Turbomach. 135 (4), 2013
Brinksmeier, E., Riemer, O., Osmer, J.: Tool path generation for ultra-precision machining of free-form surfaces. Prod. Eng. Res. Dev. 2, 241–246 (2008)
Tönshoff, H.K., Denkena, B., Böß, V., Urban, B.: Automated finishing of dies and molds. Prod. Eng. Res. Dev. 9(2), 1–4 (2002)
Acknowledgments
The investigations described in this paper were undertaken with the support of the German Research Foundation (DFG) within the project “Riblets on Compressor Blades” (DE 447/51-3).
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Denkena, B., Köhler, J., Krawczyk, T. (2014). Influence of 5-axes-kinematics Geometrical Accuracy in Riblet Manufacturing Processes. In: Denkena, B. (eds) New Production Technologies in Aerospace Industry. Lecture Notes in Production Engineering. Springer, Cham. https://doi.org/10.1007/978-3-319-01964-2_10
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DOI: https://doi.org/10.1007/978-3-319-01964-2_10
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