초록 ▼

The present invention relates to a layer for reducing the friction resistance of a fluid relative to an object and for improving the contact of a boundary layer of the fluid flowing past, and thereby increasing the lift, comprising a wave-like approach flow surface repeating in a first direction whi

The present invention relates to a layer for reducing the friction resistance of a fluid relative to an object and for improving the contact of a boundary layer of the fluid flowing past, and thereby increasing the lift, comprising a wave-like approach flow surface repeating in a first direction which comprises means for transporting fluid from the boundary layer of the fluid flowing past to cavities in the wave-like approach flow surface. The present invention further relates to a method for manufacturing such a layer.

대표청구항 ▼

1. A layer for reducing the friction resistance of a fluid relative to an object, comprising a wave-like approach flow surface repeating in a first direction which comprises means for transporting fluid from a boundary layer of the fluid flowing past to cavities in the wave-like approach flow surfac

1. A layer for reducing the friction resistance of a fluid relative to an object, comprising a wave-like approach flow surface repeating in a first direction which comprises means for transporting fluid from a boundary layer of the fluid flowing past to cavities in the wave-like approach flow surface, wherein said means comprises grooves which are provided close to wave tops of the wave-like approach flow surface. 2. The layer as claimed in claim 1, wherein the wave-like approach flow surface comprises a form of breaking waves. 3. The layer as claimed in claim 1, wherein the wave-like approach flow surface substantially takes the form of a cycloid. 4. The layer as claimed in claim 1, wherein the waves of the wave-like surface comprise a wave top which overhangs relative to the cavity situated downstream of the wave top. 5. The layer as claimed in claim 1, wherein the cavities in the wave-like approach flow surface are feather-shaped and extend from a central axis substantially in the plane of the layer. 6. The layer as claimed in claim 1, wherein the wave form varies over the surface of the layer. 7. The layer as claimed in claim 1, wherein the wave comprise a distance between the waves which is adjusted to the resonance frequency and the desired speed of the fluid flowing past. 8. The layer as claimed in claim 1, further comprising means for accelerating the boundary layer of the fluid flowing past. 9. The layer as claimed in claim 8, wherein the means for accelerating the boundary layer of the fluid flowing past comprise a displacing form. 10. The layer as claimed in claim 1, further comprising means for aligning the boundary layer of the fluid flowing past. 11. The layer as claimed in claim 10, wherein the means for aligning the boundary layer of the fluid flowing past comprise grooves arranged in a second direction. 12. The layer as claimed in claim 9, wherein the forms displacing the fluid flowing past form an angle of between 0° and 60° with the approach flow direction of the fluid. 13. The layer as claimed in claim 10, wherein the means for accelerating the boundary layer of the fluid flowing past comprises a displacing form, and wherein the forms displacing the fluid flowing past form an angle of between 0° and 60° with the approach flow direction of the fluid. 14. The layer as claimed in claim 1, further comprising means for ionizing the boundary layer of the fluid flowing past. 15. The layer as claimed in claim 1, further comprising means for ionizing the boundary layer of the fluid flowing past, wherein the means for ionizing the boundary layer of the fluid flowing past comprise an approach flow surface manufactured from Teflon or other thin, hard layer. 16. The layer as claimed in claim 12, wherein the forms displacing the fluid flowing past form an angle of about 45° with the approach flow direction of the fluid. 17. The layer as claimed in 13, wherein the forms displacing the fluid flowing past form an angle of about 45° with the approach flow direction of the fluid. 18. A layer for reducing the friction resistance of a fluid relative to an object, comprising a wave-like approach flow surface repeating in a first direction which comprises means for transporting fluid from a boundary layer of the fluid flowing past to cavities in the wave-like approach flow surface, wherein the cavities in the wave-like approach flow surface are feather-shaped and extend from a central axis substantially in the plane of the layer. 19. The layer as claimed in claim 18, further comprising a plurality of feather-shaped areas lying against each other. 20. The layer as claimed in claim 18, further comprising a gutter at a contact surface with a subsequent feather-shaped area. 21. The layer as claimed in claim 18, further comprising grooves arranged in the cavities.