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US 12,650,134 B2Granted
Jet pump system
AssigneeHoneywell International Inc.
InventorDavid Alan Plummer
Life of this patent
Estimating the term…
Abstract
A bleed system including a jet pump system configured to provide a supply gas comprising at least one of a higher pressure gas, a lower pressure gas, or a mixture of the higher pressure gas and the lower pressure gas. A needle body defines a throat region between a nozzle wall and the needle body. The needle body is configured to cause a gap between a rear needle surface of the needle body and the nozzle wall to decrease as the rear needle surface extends toward the throat region. The jet pump system is configured to discharge the higher pressure gas through the throat region and mix the higher pressure gas and the lower pressure gas in a mixing portion of an exhaust portion.
Claims19
A jet pump system comprising:
- an inner nozzle including a nozzle wall defining a nozzle outlet, wherein the inner nozzle is configured to receive a first gas flow from a high pressure chamber defined by a housing of a jet pump and discharge the first gas flow through the nozzle outlet;
- a suction chamber defined by the housing, wherein the suction chamber is configured to receive a second gas flow;
- an exhaust portion defining an exhaust volume fluidically coupled to the nozzle outlet and the suction chamber, wherein the exhaust portion defines an exhaust outlet configured to discharge a supply gas comprising the first gas flow and the second gas flow when the inner nozzle discharges the first gas flow and the suction chamber receives the second gas flow;
- a needle body configured to move relative to the nozzle wall within the inner nozzle;
- and
- a suction nozzle defined by the housing, the suction nozzle having a suction nozzle wall defining a suction nozzle volume, the suction nozzle volume being fluidically coupled to the suction chamber,
- wherein the needle body is configured to cause the first gas flow to flow through a throat region between the nozzle wall and the needle body when the inner nozzle discharges the first gas flow,
- wherein the needle body includes a downstream needle portion configured to extend into the suction nozzle volume when the needle body engages the nozzle outlet, wherein the needle body is configured to cause the second gas flow to flow through a flow passage defined between the downstream needle portion and the suction nozzle wall when the needle body engages the nozzle outlet, wherein the flow passage defines a substantially constant flow area as the flow passage extends from the nozzle outlet toward the exhaust portion,
- wherein the needle body defines a rear needle surface extending in a direction from the high pressure chamber toward the throat region, the rear needle surface configured to cause a gap between the rear needle surface and the nozzle wall to decrease as the rear needle surface extends toward the throat region, and
- wherein the needle body is configured to fluidically isolate the high pressure chamber and the exhaust portion when the needle body engages the nozzle outlet.
7 more elements
A jet pump system comprising:
- an inner nozzle including a nozzle wall defining a nozzle outlet, wherein the inner nozzle is configured to receive a first gas flow from a high pressure chamber defined by a housing of a jet pump and discharge the first gas flow through the nozzle outlet, wherein the nozzle outlet defines a first cross-sectional area;
- a suction chamber defined by the housing, wherein the suction chamber is configured to receive a second gas flow;
- an exhaust portion defining an exhaust volume fluidically coupled to the nozzle outlet and the suction chamber, wherein the exhaust portion defines an exhaust outlet configured to discharge a supply gas comprising the first gas flow and the second gas flow when the inner nozzle discharges the first gas flow and the suction chamber receives the second gas flow, and wherein the exhaust portion defines a second cross-sectional area less than or substantially equal to the first cross-sectional area;
- and
- a needle body configured to move relative to the nozzle wall within the inner nozzle,
- wherein the needle body is configured to cause the first gas flow to flow through a throat region between the nozzle wall and the needle body when the inner nozzle discharges the first gas flow,
- wherein the needle body is configured to fluidically isolate the high pressure chamber and the exhaust portion when the needle body engages the nozzle outlet,
- wherein the needle body includes a downstream needle portion configured to extend into a suction nozzle volume of the suction chamber when the needle body engages the nozzle outlet,
- wherein the needle body is configured to cause the second gas flow to flow through a flow passage defined between the downstream needle portion and a suction nozzle wall defining the suction nozzle volume when the needle body engages the nozzle outlet,
- wherein the flow passage defines a substantially constant flow area as the flow passage extends from the nozzle outlet toward the nozzle outlet,
- wherein the needle body defines a rear needle surface extending in a direction from the high pressure chamber toward the throat region, the rear needle surface configured to cause a gap between the rear needle surface and the nozzle wall to decrease as the rear needle surface extends toward the throat region, and
- wherein the needle body is configured to increase a width of the throat region when the needle body moves relative to the nozzle wall in a direction from the nozzle outlet toward the high pressure chamber.
9 more elements
A method, comprising:
- flowing, using a needle body of a jet pump and a nozzle wall of an inner nozzle of the jet pump, a first gas flow from a high pressure chamber through a throat region fluidically coupled to a nozzle outlet defined by the nozzle wall,
- wherein the high pressure chamber is defined by a housing,
- wherein the throat region is between the nozzle wall and the needle body, wherein the needle body is configured to move relative to the nozzle wall within the inner nozzle, wherein the needle body is configured to fluidically isolate the high pressure chamber and an exhaust portion of the jet pump when the needle body engages the nozzle outlet, wherein the exhaust portion is fluidically coupled to the nozzle outlet and a suction chamber defined by the housing,
- wherein the suction chamber is configured to receive a second gas flow,
- wherein the housing defines a suction nozzle, the suction nozzle having a suction nozzle wall defining a suction nozzle volume, the suction nozzle volume being fluidically coupled to the suction chamber,
- wherein the needle body includes a downstream needle portion configured to extend into the suction nozzle volume when the needle body engages the nozzle outlet, wherein the needle body is configured to cause the second gas flow to flow through a flow passage defined between the downstream needle portion and the suction nozzle wall when the needle body engages the nozzle outlet, wherein the flow passage defines a substantially constant flow area as the flow passage extends from the nozzle outlet toward the exhaust portion, and
- wherein the needle body defines a rear needle surface extending in a direction from the high pressure chamber toward the throat region, the rear needle surface configured to cause a gap between the rear needle surface and the nozzle wall to decrease as the rear needle surface extends toward the throat region;
- and discharging, using the exhaust portion, a supply gas comprising at least the first gas flow.
5 more elements
Dependencies are inferred from the claim text.