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Gecko mimicking surfaces
Fecko, Peter ; Boušek, Jaroslav (oponent) ; Pekárek, Jan (vedoucí práce)
Adhesive capabilities of a gecko lizard have been the subject of many studies and an inspiration for many artificial imitations and inventions. This work proposes a design version of synthetic gecko structures in a form of micro-pillars, that would have similar adhesion capabilities as gecko setae. Structures made of Parylene C polymer have been created using photolithography and silicon etching techniques. Following focus was on various methods of surface modifications and characterisation of these structures to determine the adhesion forces on their surface, before and after modifications.
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Numerical analysis of bio-mimetic concept for active flow control on wing surface
Čermák, Jakub ; Navrátil, Jan (oponent) ; Popela, Robert (vedoucí práce)
In this paper optimization on airfoil equipped with upper-side elastic flap is carried out. The optimization process is done by using of URANS CFD method. In first chapters the history of development of wing with movable flaps is briefly described. The paper continues with description and motivation on choice of computational method. Geometry and mesh generation is briefly explained. Verification and validation of computational method is also presented. The actual case study is focused on airfoil LS(1)-0417mod equipped with 20%, 30% and 40% long rigid flap on various angles of attack. The aerodynamic performance of each case is discussed together with the flow-field analysis. The non-linear structural analysis using FEM software is carried out in order to evaluate elastic flap bending stiffness and deformed shape to fulfil self-adaptive requirements.
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Gecko Mimicking Surfaces
Fecko, Peter
Adhesive capabilities of a gecko lizard have been the subject of many studies and an inspiration for many artificial imitations and inventions. This work proposes a design of synthetic gecko mimicking structures in a form of micro-pillars, that would have similar adhesion capabilities as gecko setae. Structures made of Parylene C have been created using photolithography and silicon etching methods. Following focus will be on various surface modifications and characterisation of these structures to determine the adhesion forces present.
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Gecko mimicking surfaces
Fecko, Peter ; Boušek, Jaroslav (oponent) ; Pekárek, Jan (vedoucí práce)
Adhesive capabilities of a gecko lizard have been the subject of many studies and an inspiration for many artificial imitations and inventions. This work proposes a design version of synthetic gecko structures in a form of micro-pillars, that would have similar adhesion capabilities as gecko setae. Structures made of Parylene C polymer have been created using photolithography and silicon etching techniques. Following focus was on various methods of surface modifications and characterisation of these structures to determine the adhesion forces on their surface, before and after modifications.
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Numerical analysis of bio-mimetic concept for active flow control on wing surface
Čermák, Jakub ; Navrátil, Jan (oponent) ; Popela, Robert (vedoucí práce)
In this paper optimization on airfoil equipped with upper-side elastic flap is carried out. The optimization process is done by using of URANS CFD method. In first chapters the history of development of wing with movable flaps is briefly described. The paper continues with description and motivation on choice of computational method. Geometry and mesh generation is briefly explained. Verification and validation of computational method is also presented. The actual case study is focused on airfoil LS(1)-0417mod equipped with 20%, 30% and 40% long rigid flap on various angles of attack. The aerodynamic performance of each case is discussed together with the flow-field analysis. The non-linear structural analysis using FEM software is carried out in order to evaluate elastic flap bending stiffness and deformed shape to fulfil self-adaptive requirements.
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