Micro-bubble generator, vortex breakdown nozzle for micro-bubble generator, vane swirler for micro-bubble generator, micro-bubble generating method, and micro-bubble applying device
AssigneeNational University Corporation University of Tsukuba
InventorsHarumichi Abe, Kazuo Matsuuchi, Minoru Iidaka
Life of this patent
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Abstract
There is provided a micro-bubble generator including a swirling-flow generating vane nozzle and vortex breakdown nozzle connected coaxially to each other. The swirling flow generating vane nozzle produces a swirling flow of a liquid having a gas introduced to the center thereof from a gas feeding unit. The swirling flow is supplied to a flow constricting section included in the vortex breakdown nozzle to provide micro bubbles from a vortex breakdown section also included in the vortex breakdown nozzle.
Claims17
A micro-bubble generator comprising at least a vortex breakdown nozzle including a flow constricting section and vortex breakdown section, wherein a swirling flow of liquid having a gas introduced to the center thereof is supplied to the flow constricting section to provide micro bubbles from the vortex breakdown section,
- further comprising a swirling-flow generating vane type nozzle connected coaxially to the vortex breakdown nozzle,
- the swirling-flow generating vane type nozzle being formed from a vane swirler enclosed in a cylindrical pipe,
- the vane swirler including a cylindrical body of which one end portion is formed streamlined,
- a plurality of vanes being provided on the outer circumferential surface of the cylindrical body longitudinally of the latter and having the rear portions thereof curved,
- a jet orifice of a gas being formed in the other end portion of the cylindrical body, and
- the swirling flow being formed by supplying the liquid to the inlet of the swirling-flow generating vane type nozzle.
A swirling-flow generating vane type nozzle for use in a micro-bubble generator, the swirling-flow generating vane type nozzle comprising a vane swirler enclosed in a cylindrical pipe,
- the vane swirler including a cylindrical body of which one end portion is formed streamlined,
- a plurality of vanes being provided on the outer circumferential surface of the cylindrical body longitudinally of the latter and having the rear portions thereof curved, and
- a jet orifice of a gas being formed in the other end portion of the cylindrical body.
A vane swirler for use in a micro-bubble generator, the vane swirler comprising a cylindrical body of which one end portion is formed streamlined,
- a plurality of vanes being provided on the outer circumferential surface of the cylindrical body longitudinally of the latter and having the rear portions thereof curved, and
- a jet orifice of a gas being formed in the other end portion of the cylindrical body.
A micro-bubble generating method in which at least a vortex breakdown nozzle including a flow constricting section and a vortex breakdown section is used to provide micro bubbles from the vortex breakdown section by supplying a swirling flow of liquid having a gas introduced to the center thereof to the flow constricting section,
- further using a swirling-flow generating vane type nozzle connected coaxially to the vortex breakdown nozzle,
- the swirling-flow generating vane type nozzle being formed from a vane swirler enclosed in a cylindrical pipe,
- the vane swirler including a cylindrical body of which one end portion is formed streamlined,
- a plurality of vanes being provided on the outer circumferential surface of the cylindrical body longitudinally of the latter and having the rear portions thereof curved,
- a jet orifice of a gas being formed in the other end portion of the cylindrical body, and
- the swirling flow being formed by supplying the liquid to the inlet of the swirling-flow generating vane type nozzle.
A micro-bubble applying device comprising at least a micro-bubble generator,
- at least one micro-bubble generator being a micro-bubble generator comprising at least a vortex breakdown nozzle comprising a flow constricting section and a vortex breakdown section, a swirling flow of liquid having a gas introduced to the center thereof being supplied to the flow constricting section to provide micro-bubbles from the vortex breakdown section,
- the micro-bubble generator further comprising a swirling-flow generating vane type nozzle connected coaxially to the vortex breakdown nozzle,
- the swirling-flow generating vane type nozzle being formed from a vane swirler enclosed in cylindrical pipe,
- the vane swirler including a cylindrical body of which one end portion is formed streamlined,
- a plurality of vanes being provided on the outer circumferential surface of the cylindrical body longitudinally of the latter and having the rear portions thereof curved,
- a jet orifice of a gas being formed in the other end portion of the cylindrical body, and
- the swirling flow being formed by supplying the liquid to the inlet of the swirling-flow generating vane type nozzle.
Dependencies are inferred from the claim text.