초록 ▼

The disclosure relates to a layer (1) for reducing air resistance of a forward-moving object, which layer comprises a pattern of surfaces (2) rising in a first direction R, and—channels (3) running between the surfaces in a second direction at an angle to the first direction. A flow is brought about

The disclosure relates to a layer (1) for reducing air resistance of a forward-moving object, which layer comprises a pattern of surfaces (2) rising in a first direction R, and—channels (3) running between the surfaces in a second direction at an angle to the first direction. A flow is brought about on a micro-scale in the channels which damps the occurrence of turbulence in the main flow over the surface, thereby reducing air resistance.

대표청구항 ▼

1. A layer for reducing air resistance of a foreword-moving object, which layer comprises: a) a base surface;b) a pattern of projections extending from the base surface;c) wherein the pattern of projections comprises projections adjacent to each other in a direction substantially aligned with the di

1. A layer for reducing air resistance of a foreword-moving object, which layer comprises: a) a base surface;b) a pattern of projections extending from the base surface;c) wherein the pattern of projections comprises projections adjacent to each other in a direction substantially aligned with the direction of flow, and separate projections substantially adjacent to each other in a direction orthogonal to the direction of flow;d) each projection having a top surface which is inclined in a first direction relative to the base surface;e) wherein the top surface of each projection lies upon a geometric plane;f) wherein the top surface of each projection reduces air resistance of the forward-moving object by increasing micro-scale turbulence as the air passes over the pattern of projections extending from the base surface;g) wherein each projection comprises at least one groove running in the first direction; andh) channels running between each projection in a second direction at an angle to the first direction. 2. The layer as recited in claim 1, wherein the first and second directions form an angle of between 30° and 60°, preferably 45°. 3. The layer as recited in claim 1, wherein the width of at least one groove lies in the range of 0.1-1 mm. 4. The layer as recited in claim 1, wherein the quotient of the pitch distance in the first direction between adjacent surfaces and the speed of the object is substantially 20-65 kHz. 5. The layer as recited in claim 1, wherein the layer is a foil. 6. The layer as recited in claim 5, wherein the foil has a PVC base layer and a polytetrafluoroethylen top layer. 7. The layer as claimed in claim 5, wherein the foil has a base layer and a top layer. 8. The layer as recited in claim 2, wherein the first and second directions form an angle of 45°. 9. The layer as recited in claim 1 wherein the layer is disposed upon the surface of a foil. 10. The layer as recited in claim 1, wherein each projection comprises: a) a top surface which is inclined in a first direction relative to the base surface from a first corner of the projection to a diagonally opposed second corner of the projection;b) wherein the diagonal direction is in a geometric plane parallel to the base surface; andc) wherein the first corner is substantially at the level of the base surface. 11. The layer as recited in claim 1, wherein the base surface substantially lies upon a geometric plane. 12. The layer as recited in claim 11, wherein each groove comprises a bottom which is substantially parallel to the base surface. 13. The layer as recited in claim 12, wherein each groove comprises a bottom which is substantially parallel to, and in contact with the base surface. 14. The layer as recited in claim 12, wherein each groove comprises a bottom which is in contact with the base surface. 15. The layer as recited in claim 1, wherein each projection comprises sidewalls on at least three sides of each projection wherein each sidewall substantially lies upon a geometric plane and wherein each sidewall is substantially orthogonal to the base surface. 16. The layer as recited in claim 1, wherein the first direction is parallel to the forward direction of the moving object. 17. The layer as recited in claim 1, wherein each channel comprises a bottom which substantially lies upon a geometric plane and wherein the bottom is substantially parallel to, and in contact with, the base surface. 18. The layer as recited in claim 1, comprising a plurality of substantially parallel grooves wherein adjacent grooves on the same projection are separated by a significant portion of the top surface of the projection.