F - Mech Eng,Light,Heat,Weapons – 04 – D
Patent
F - Mech Eng,Light,Heat,Weapons
04
D
F04D 1/00 (2006.01) F04D 5/00 (2006.01) F04D 17/00 (2006.01) F04D 17/04 (2006.01) F04D 17/08 (2006.01) F04D 17/16 (2006.01) F04D 29/18 (2006.01) F04D 29/68 (2006.01)
Patent
CA 2054729
Movement of a fluid such as air is produced by rotating about a rotational axis (O-O) a plurality of flow generating plates (P, P1, P1a, P1b, P2, P3) arranged parallelly with clearances (CL) therebetween. The clearances (CL) between adjacent two flow generating plates for producing the movement of the fluid most effectively only by adhesion of the fluid to the flow generating plates, is set as follows. That is, the clearances (CL) are set to be twice a value (c) of a distance of an intermediate portion between the surface of the flow generating plate contacting a portion of the fluid in a close boundary layer which is rotated and moved substantially together with the flow generating plate and a remote fluid boundary layer which is substantially not influenced by centrifugal force due to the rotation of the flow generating plate. In the case of air, the clearances are about 0.5 mm. It is preferred to form the flow generating plate so as to have a waved surface for improving the flow generating efficiency.
Le mouvement d'un fluide comme l'air est obtenu par rotation autour d'un axe (O-O) de plusieurs plaques parallèles de production de flux (P, P1, P1a, P1b, P2, P3) présentant un espacement (CL). On établit comme suit cet espacement (CL) entre deux plaques adjacentes permettant d'obtenir, de façon très efficace, un mouvement du fluide seulement par l'adhérence du fluide aux plaques de production de flux. L'espacement (CL) doit correspondre au double de la valeur (c) de la distance d'une partie intermédiaire entre la surface de la plaque en contact avec une partie du fluide en couche limite étroite, qui est tournée et déplacée considérablement avec la plaque de production de flux, et une couche limite de fluide éloignée qui n'est presque pas influencée par la force centrifuge résultant de la rotation de la plaque. Pour ce qui est de l'air, les espacements sont d'environ 0,5 mm. Il est souhaitable de former la plaque de façon à avoir une surface ondulée, afin d'augmenter l'efficacité de la production de flux.
Nissho Giken Kabushiki Kaisha
Riches Mckenzie & Herbert Llp
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