Reverse-flow nozzle for generating cavitating or pulsed jets
AssigneeVLN Advanced Technologies Inc.
InventorMohan M. Vijay
Life of this patent
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Abstract
A reverse-flow nozzle generates a cavitating and/or pulsed jet of pressurized liquid. The nozzle includes a body having an inlet for receiving a stream of liquid and a main channel through the body extending from the inlet to an outlet. A flow-reversing channel in the nozzle diverts a portion of the liquid from the main channel to a point downstream of a mixing chamber. The channel returns the diverted liquid back into the mixing chamber as a reverse-flow jet relative to a main stream of liquid flowing toward the outlet. This reverse-flow jet interacts with the main stream to generate the cavitating jet that discharges from the outlet. By angling the reverse-flow jet relative to the main stream, a naturally pulsed jet may be generated.
Claims30
A nozzle for generating a cavitating jet of pressurized liquid, the nozzle having a body comprising:
- a main channel extending through the body, the main channel having a main inlet for receiving the pressurized liquid and a main outlet for discharging the pressurized liquid from the nozzle, the main channel including a mixing chamber disposed between the inlet and the outlet;
- a flow-reversing channel having:
- a first liquid-diverting inlet for diverting a portion of the pressurized liquid from a main stream flowing through the main channel;
- and
- a reverse-flow outlet connected to the mixing chamber for discharging a reverse flow of pressurized liquid into the mixing chamber to thereby create shear forces between the main stream and the reverse flow that generate cavitating bubbles in the main stream of pressurized liquid in the mixing chamber, thereby generating the cavitating jet;
- and
- a shroud-generating channel having a second liquid-diverting inlet for receiving pressurized liquid from the mixing chamber and a shroud-jet outlet disposed radially outwardly of the main outlet of the main channel, the shroud jet outlet discharging an annular shroud jet that enshrouds the cavitating jet discharged from the main outlet.
A nozzle for generating a naturally pulsed jet of pressurized liquid, the nozzle having a body comprising:
- a main channel extending through the body, the main channel having a main inlet for receiving the pressurized liquid and a main outlet for discharging the pressurized liquid from the nozzle, the main channel including a mixing chamber disposed between the main inlet and the main outlet;
- a flow-reversing channel having:
- a first liquid-diverting inlet for diverting a portion of the pressurized liquid from a main stream flowing through the main channel;
- and
- a reverse-flow outlet connected to the mixing chamber for discharging an angled reverse flow of pressurized liquid into the mixing chamber at an angle relative to the main stream to thereby intermittently interrupt the main stream, thereby generating the naturally pulsed jet;
- and
- a shroud-generating channel having a second liquid-diverting inlet for receiving pressurized liquid from the mixing chamber and a shroud-jet outlet disposed radially outwardly of the main outlet of the main channel, the shroud jet outlet discharging an annular shroud jet that enshrouds the pulsed jet discharged from the main outlet.
A reverse-flow cavitation nozzle for generating a cavitating jet of pressurized liquid, the nozzle comprising:
- a nozzle body having a main inlet for receiving a stream of the pressurized liquid;
- a main channel extending through the nozzle body from the main inlet to a main outlet;
- a flow-reversing channel having a liquid-diverting inlet in fluid communication with the main channel at a point upstream of a mixing chamber for diverting into the flow-reversing channel a diverted portion of the liquid from the main channel and for returning the diverted liquid to the mixing chamber as a reverse-flow jet relative to a main stream of liquid flowing toward the main outlet, wherein the reverse-flow jet interacts with the main stream to generate the cavitating jet that discharges from the main outlet.
A reverse-flow nozzle for generating a naturally pulsed jet of pressurized liquid, the nozzle comprising:
- a nozzle body having a main inlet for receiving a stream of the pressurized liquid;
- a main channel extending through the nozzle body from the main inlet to a main outlet;
- a flow-reversing channel having a liquid-diverting inlet in fluid communication with the main channel at a point upstream of a mixing chamber for diverting into the flow-reversing channel a diverted portion of the liquid from the main channel and for returning the diverted liquid to the mixing chamber as a reverse-flow jet that is both reversed and angled relative to a main stream of liquid flowing toward the main outlet, wherein the reverse-flow jet intermittently interrupts the main stream to generate the naturally pulsed jet that discharges from the main outlet.
Dependencies are inferred from the claim text.