To provide a fine-bubble generating apparatus in a hull to reduce fluid friction resistance by forming thick water layers including fine bubbles on an immersed surfaces of the hull, using a root pump which can mix a large amount of air in the sucked water.
This generating apparatus includes the root pump 3 in which a pair of two-leaf root motors are mounted to be rotatable by a driving motor as well as an air intake port and a collision member bringing sucked water into collision, which are installed on a pipe line communicating with an intake pipe 45. By operating the root pump 3, water is sucked from a water intake 75 of the hull 71 of the ship 70. Moreover, by bringing the water mixed with air taken in from the air intake port into collision with a collision member, a large amount of bubbles are generated. Further, by means of a compression action by the root pump 3, bubbles are miniaturized and the water including the miniaturized bubbles is blown into water from a discharge port of the hull 71.
ITO YOSHINOBU
KATO TOSHIAKI
TAKEDA MASASHI
KUME KOICHI
ITO HIROYUKI
YOKOI IKUTO
JPS61112782A | 1986-05-30 | |||
JP2009248611A | 2009-10-29 | |||
JP2009160963A | 2009-07-23 | |||
JPS60139586A | 1985-07-24 | |||
JPH08229370A | 1996-09-10 | |||
JPH08239084A | 1996-09-17 | |||
JPH1159563A | 1999-03-02 | |||
JP2002274478A | 2002-09-25 |
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