抄録
Recently, the machines of compact, high performance and silent type are desired. As for pumps, the extremely small sized type is needed for cooling devices of electronics. Therefore the space of installing the impeller is severely restricted. In that case, the friction type pumps (disk pumps) are highlighted which are constructed only by disks. The disk pump is very silent and causes small vibration, whereas its performance is not so high because of no blade. In this paper, the performance characteristics of single disk pump and multi disk pump are examined. The number of disks and gap size between disks are changed systematically.
