Mixing fluid streams
First Claim
1. Apparatus for mixing together two fluid streams, comprising:
- a first fluid conduit for carrying a first fluid stream between an inlet and an outlet;
a venturi provided in said first fluid conduit between said inlet and said outlet, the venturi comprising an upstream tapering portion which converges towards a reduced diameter throat and a downstream diffusing portion which diverges from the throat towards said outlet, the tapering portion, throat and diffusing portion being defined around a central axis;
at least one mixing inlet having a discrete opening communicating with the throat of the venturi for introducing a second fluid stream into said first fluid stream so that the two fluid streams mix as they flow through the venturi diffuser portion towards the outlet;
wherein said mixing inlet is configured to direct said second fluid stream into the venturi throat in a direction lying in a plane disposed at an angle between 90° and
45°
to said axis, and a direction not more than about 30°
to a plane tangential to the venturi throat in the region of the mixing inlet.
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Abstract
Apparatus for mixing together two fluid streams comprises a first fluid conduit for carrying a first fluid stream between an inlet and an outlet, a venturi being provided in said first fluid conduit between said inlet and said outlet. The venturi comprises an upstream tapering portion which converges towards a reduced diameter throat and a downstream diffusing portion which diverges from the throat towards the outlet. The tapering portion, throat and diffusing portion are defined around a central axis. At least one mixing inlet having a discrete opening communicating with the throat of the venturi is provided for introducing a second fluid stream into the first fluid stream so that the two fluid streams mix as they flow through the venturi diffuser portion towards the outlet. The mixing inlet is configured to direct the second fluid stream into the venturi throat in a direction lying in a plane disposed at an angle between 90° and 45° to the axis, and a direction not more than about 30° to a plane tangential to the venturi throat in the region of the mixing in
385 Citations
18 Claims
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1. Apparatus for mixing together two fluid streams, comprising:
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a first fluid conduit for carrying a first fluid stream between an inlet and an outlet;
a venturi provided in said first fluid conduit between said inlet and said outlet, the venturi comprising an upstream tapering portion which converges towards a reduced diameter throat and a downstream diffusing portion which diverges from the throat towards said outlet, the tapering portion, throat and diffusing portion being defined around a central axis;
at least one mixing inlet having a discrete opening communicating with the throat of the venturi for introducing a second fluid stream into said first fluid stream so that the two fluid streams mix as they flow through the venturi diffuser portion towards the outlet;
wherein said mixing inlet is configured to direct said second fluid stream into the venturi throat in a direction lying in a plane disposed at an angle between 90° and
45°
to said axis, and a direction not more than about 30°
to a plane tangential to the venturi throat in the region of the mixing inlet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 17, 18)
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15. An exhaust gas re-circulation system for an internal combustion engine, comprising:
- a first fluid conduit for carrying an intake air stream between an air inlet and an outlet supplying air to said internal combustion engine;
a venturi provided in said first fluid conduit between said inlet and said outlet, the venturi comprising an upstream tapering portion which converges towards a reduced diameter throat and a downstream diffusing portion which diverges from the throat towards said outlet, the tapering portion, throat and diffusing portion being defined around a central axis;
at least one mixing inlet having a discrete opening communicating with the throat of the venturi for introducing exhaust from said internal combustion engine into said intake air so that the two fluid streams mix as they flow through the venturi diffuser portion towards the outlet;
wherein said mixing inlet is configured to direct said second fluid stream into the venturi throat in a direction lying in a plane disposed at an angle between 90° and
45°
to said axis, and a direction not more than about 30°
to a plane tangential to the venturi throat in the region of the mixing inlet.
- a first fluid conduit for carrying an intake air stream between an air inlet and an outlet supplying air to said internal combustion engine;
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16. A method of mixing together two fluid streams, the method comprising:
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flowing a first fluid stream through a first fluid conduit provided with a venturi having an upstream tapering portion which converges towards a reduced diameter throat and a downstream diffusing portion which diverges from the throat towards an outlet;
introducing a second fluid stream into the first fluid stream through a discrete opening in the region of the venturi throat so that two streams mix within the venturi diffuser portion as they flow together towards said outlet;
wherein the second fluid stream is directed into the first fluid stream in a direction lying in a plane disposed at an angle between 90° and
45°
to the direction of flow of the first fluid stream through the venturi, and a direction not more than about 30°
to a plane tangential to the venturi throat in the region where the two fluid streams meet.
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Specification