This paper deals with the study of different structuring methods for high temperature nickel alloys, which are used for compressor and turbine blades in aeroengines. The ideal structured surface combines high oxidation resistance with low drag in a hot gas flow. The effect of drag reduction due to riblet structured surfaces was originally inspired by the shark scales, which have a drag reducing riblet structure. Riblets were successfully produced on a NiCoCrAlY coating by picosecond laser treatment. This method is suitable for larger structures within the range of some tens of micrometers. Furthermore, experiments were performed by depositing different materials through polymer and metal masks via electrodeposition and physical vapor deposition. All fabricated structures were oxidized at 900–1100°C for up to 100 h to simulate the temperature conditions in an aeroengine. The resulting shape of the riblets was characterized using scanning electron microscopy. The most accurate structures were obtained by using photolithography with a subsequent electrodeposition of nickel. This method is suited for single digit micrometer structures. The reduction of the wall shear stress was measured in an oil channel. The riblet structures prior to oxidation showed a reduction of the wall shear stress of up to 4.9%.
Skip Nav Destination
ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
September 28–October 1, 2010
Philadelphia, Pennsylvania, USA
Conference Sponsors:
- Aerospace Division
ISBN:
978-0-7918-4415-1
PROCEEDINGS PAPER
Fabrication, Oxidation and Characterization of Shark Skin Inspired Riblet Structures as Aerodynamically Optimized High Temperature Coatings for Blades of Aeroengines Available to Purchase
Claudia C. Bu¨ttner,
Claudia C. Bu¨ttner
German Aerospace Center, Cologne, Germany
Search for other works by this author on:
Uwe Schulz
Uwe Schulz
German Aerospace Center, Cologne, Germany
Search for other works by this author on:
Claudia C. Bu¨ttner
German Aerospace Center, Cologne, Germany
Uwe Schulz
German Aerospace Center, Cologne, Germany
Paper No:
SMASIS2010-3626, pp. 687-693; 7 pages
Published Online:
April 4, 2011
Citation
Bu¨ttner, CC, & Schulz, U. "Fabrication, Oxidation and Characterization of Shark Skin Inspired Riblet Structures as Aerodynamically Optimized High Temperature Coatings for Blades of Aeroengines." Proceedings of the ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Volume 1. Philadelphia, Pennsylvania, USA. September 28–October 1, 2010. pp. 687-693. ASME. https://doi.org/10.1115/SMASIS2010-3626
Download citation file:
17
Views
Related Proceedings Papers
Related Articles
Protective Coatings of Metallic Interconnects for IT-SOFC Application
J. Fuel Cell Sci. Technol (February,2008)
Coating Effect on Particle Trajectories and Turbine Blade Erosion
J. Eng. Gas Turbines Power (April,1992)
Thermomechanical and Isothermal Fatigue Behavior of Bare and Coated Superalloys
J. Eng. Mater. Technol (January,1996)
Related Chapters
Pipeline Protection
Pipeline Design & Construction: A Practical Approach, Third Edition
Surface Analysis and Tools
Tribology of Mechanical Systems: A Guide to Present and Future Technologies
Nuclear Components Operating in the Creep Regime
Analysis of ASME Boiler, Pressure Vessel, and Nuclear Components in the Creep Range