초록 ▼

A device for accelerating the destruction of contra-rotating vortices formed at the rear of wings of a moving body by the merging of at least two co-rotating eddies includes, on each of the wings, at least one perturbator which is positioned in the vicinity of the area of creation of one of the co-r

A device for accelerating the destruction of contra-rotating vortices formed at the rear of wings of a moving body by the merging of at least two co-rotating eddies includes, on each of the wings, at least one perturbator which is positioned in the vicinity of the area of creation of one of the co-rotating eddies associated with the wing. Each of the perturbators generates a periodic perturbation of the flow, which has a wavelength capable of exciting at least one of the instability modes of the corresponding eddy in such a way as to increase the core of the contra-rotating vortex which is created from this eddy, in such a way that the diameter of the core becomes greater than a predetermined proportion of the inter-vortex distance.

대표청구항 ▼

A device for accelerating the destruction of contra-rotating vortices formed at the rear of wings of a moving body by the merging of at least two co-rotating eddies includes, on each of the wings, at least one perturbator which is positioned in the vicinity of the area of creation of one of the co-r

A device for accelerating the destruction of contra-rotating vortices formed at the rear of wings of a moving body by the merging of at least two co-rotating eddies includes, on each of the wings, at least one perturbator which is positioned in the vicinity of the area of creation of one of the co-rotating eddies associated with the wing. Each of the perturbators generates a periodic perturbation of the flow, which has a wavelength capable of exciting at least one of the instability modes of the corresponding eddy in such a way as to increase the core of the contra-rotating vortex which is created from this eddy, in such a way that the diameter of the core becomes greater than a predetermined proportion of the inter-vortex distance. ing a linear load (LKPrimNip) in the new winding nip by a corresponding displacement and tightening of the reeling drum; separating the material web by at least one separator device to form a new web leader; winding the new web leader onto the new reel spool; removing the old wound reel from the reeling drum, thereby opening the winding nip; and moving the new reel spool in a primary transport device while maintaining the new winding nip until the position of the new winding nip corresponds to the position where the winding nip was located. 2. The process in accordance with claim 1, wherein the material web comprises one of a paper or cardboard web. 3. The process in accordance with claim 1, wherein the moving of the new reel spool comprises moving the new reel spool over the reeling drum via the primary transport device until the new reel spool is taken over by the secondary transport device. 4. The process in accordance with claim 1, wherein the removing of the old wound reel comprises moving the old wound reel via the secondary transport device. 5. The process in accordance with claim 1, wherein during the joint displacement of the reeling drum and the old wound reel, the process further comprises adjusting, controlling, or regulating the linear load (LKSekNip) in the old winding nip by a corresponding displacement and tightening of the old wound reel. 6. The process in accordance with claim 1, wherein the reeling drum is acted on by a force (KTT) generating the linear load (LKSekNip), and the force (KTT) is greater than a force (KSekSchl) acting on the old wound reel and causes the joint displacement of the reeling drum and the old wound reel while maintaining the old winding nip. 7. The process in accordance with claim 1, wherein the old wound reel is acted on by a pressure system generating the linear load (LKSekNip) and the pressure system comprises at least two pressure units arranged such that each of the pressure units are acted on by a respective force (KSekSchl,KSekSchl-II) to generate the linear load (LKSekNip). 8. The process in accordance with claim 7, wherein the at least two pressure units are independent of one another. 9. The process in accordance with claim 7, wherein the old wound reel is acted on by a force (KSekSchl) generating the linear load (LKSekNip), and the force (KSekSchl) is smaller than a force (KTT) acting on the reeling drum and causes the joint displacement of the reeling drum and the old wound reel while maintaining the old winding nip. 10. The process in accordance with claim 7, wherein the old wound reel is acted on by a force (KSekSchl-II) generating the linear load (LKSekNip) and the force (KSekSchl-II) is smaller than a force (KTT) acting can the reeling drum and causes the joint displacement of the reeling drum and the old wound reel while maintaining the old winding nip. 11. The process in accordance with claim 7, wherein the diameter of the old wound reel increases during the joint displacement of the reeling drum and the old wound reel, while maintaining the old winding nip, is compensated for by a corresponding displacement of at least one pressure unit. 12. The process in accordance with claim 7, wherein the at least two pressure units comprises a first and second pressure unit, and wherein the old wound reel is supported by a displaceable movement device acted on by the second pressure unit in the secondary transport device, and the secondary transport device is acted on by the first pressure unit, and the old wound reel is acted on by the force (KSekSchl-II) during a main winding phase in which it is supported in the secondary transport device in a stationary manner. 13. The process in accordance with claim 1, wherein a force (KTT) acting on the reelin