Shark skin inspired surfaces for aerodynamically optimized high temperature applications [Elektronische Ressource] : fabrication, oxidation, characterization / Claudia Christine Büttner

SHARK SKIN INSPIRED SURFACES FORAERODYNAMICALLY OPTIMIZED HIGHTEMPERATURE APPLICATIONS -FABRICATION, OXIDATION,CHARACTERIZATIONVon der Fakultät für Georessourcen und Materialtechnikder Rheinisch - Westfälischen Technischen Hochschule Aachenzur Erlangung des akademischen Grades einesDoktors der Ingenieurwissenschaftengenehmigte Dissertationvorgelegt von Dipl.-Ing.Claudia Christine Büttneraus ErfurtBerichter: Univ.-Prof. Jochen M. Schneider, Ph.D.Univ.-Prof. Dr.-Ing. Christoph LeyensTag der mündlichen Prüfung: 25. Mai 2011Diese Dissertation ist auf den Internetseiten der Hochschulbibliothek online verfügbarAmong other things, the high speed of sharks is caused by reduced friction between water andskin due to riblet structures on the shark scales. When using a surface with riblet structures, theturbulent momentum transfer at the wall, which is responsible for the skin friction, is hampered.This works for all turbulent flowing fluidic media such as liquids and gases. The effect of drag re-duction has already been used for airfoil wings that were laminated with polymer based riblets. Areduced flow resistance was obtained, resulting in less fuel consumption. A potential new appli-cation field for riblet surfaces are blades and vanes for aeroengines. Riblet structured coatings onthe blades would act as oxidation and corrosion protection and additionally reduce the skin dragon the surface.