Efficient anti-ice exhaust vent
First Claim
1. A powerplant for an aircraft, the powerplant including a longitudinal axis, a nacelle disposed about the axis and defining an axial flowpath, the nacelle having an inner barrel defining a radially outer flow surface for a portion of the flowpath, an outer barrel disposed radially outward of the inner barrel and defining a flow surface for an external medium flowing over the nacelle, a forward bulkhead extending between the axially forward ends of the inner barrel and outer barrel, an annular inlet shell extending forward of the forward bulkhead, and an anti-ice system, wherein the anti-ice system includes:
- a source of heating fluid, the source producing a fluid having a temperature and pressure greater than the temperature and pressure of the fluid medium external to the gas turbine engine;
a cavity bounded by the inlet shell and the forward bulkhead;
a conduit extending from the source to the cavity and defining a flowpath for heating fluid, the conduit having an outlet;
a nozzle disposed within the cavity and attached to the outlet of the conduit, the nozzle defining means to inject heating fluid into the cavity and to generate a body of fluid flowing within the cavity with a circumferentially directed component of velocity;
a plurality of exhaust slots disposed on the radially outer portion of the inlet shell;
a plurality of aerodynamically shaped exhaust vanes, each of the exhaust vanes disposed on the inlet shell, extending radially into the cavity, and being adjacent to and extending parallel to one of the plurality of exhaust slots, the exhaust vanes adapted to engage the fluid flowing within the cavity; and
wherein the plurality of exhaust vanes engage the fluid flowing within the cavity to turn a portion of the fluid to a direction substantially normal to the direction of flow of the medium external to the nacelle and to urge the portion of fluid to flow through the plurality of exhaust slots.
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Accused Products
Abstract
An anti-icing system for a nacelle of a gas turbine powerplant is disclosed. Various construction details have been developed which provide means to exhaust fluid from an inlet shell cavity and into an external medium. In one embodiment, the exhaust means (62) includes a plurality of aerodynamically shaped vanes (66) disposed within the inlet shell cavity (52) and a plurality of exhaust slots (68) wherein each of the vanes is adjacent one of the exhaust slots. The vanes are adapted to turn a portion of the body of fluid flowing within the inlet shell cavity to a direction substantially normal to the direction of flow of the external medium.
52 Citations
12 Claims
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1. A powerplant for an aircraft, the powerplant including a longitudinal axis, a nacelle disposed about the axis and defining an axial flowpath, the nacelle having an inner barrel defining a radially outer flow surface for a portion of the flowpath, an outer barrel disposed radially outward of the inner barrel and defining a flow surface for an external medium flowing over the nacelle, a forward bulkhead extending between the axially forward ends of the inner barrel and outer barrel, an annular inlet shell extending forward of the forward bulkhead, and an anti-ice system, wherein the anti-ice system includes:
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a source of heating fluid, the source producing a fluid having a temperature and pressure greater than the temperature and pressure of the fluid medium external to the gas turbine engine; a cavity bounded by the inlet shell and the forward bulkhead; a conduit extending from the source to the cavity and defining a flowpath for heating fluid, the conduit having an outlet; a nozzle disposed within the cavity and attached to the outlet of the conduit, the nozzle defining means to inject heating fluid into the cavity and to generate a body of fluid flowing within the cavity with a circumferentially directed component of velocity; a plurality of exhaust slots disposed on the radially outer portion of the inlet shell; a plurality of aerodynamically shaped exhaust vanes, each of the exhaust vanes disposed on the inlet shell, extending radially into the cavity, and being adjacent to and extending parallel to one of the plurality of exhaust slots, the exhaust vanes adapted to engage the fluid flowing within the cavity; and wherein the plurality of exhaust vanes engage the fluid flowing within the cavity to turn a portion of the fluid to a direction substantially normal to the direction of flow of the medium external to the nacelle and to urge the portion of fluid to flow through the plurality of exhaust slots. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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2. An anti-icing system for a powerplant having a longitudinal axis, a source of heating fluid, and a nacelle defining a radially outer boundary for the power plant, the nacelle having a cavity disposed about the axis, the anti-icing system including:
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means to flow heating fluid from the source to the cavity; means to inject heating fluid into the cavity, the injection means injecting fluid such that a body of fluid flowing within the cavity is generated; and means to exhaust fluid from the cavity into a medium external of the nacelle, the exhaust means engaging the fluid flowing within the cavity to turn a portion of the fluid to a direction substantially normal to the direction of flow of the medium external of the nacelle and to eject the fluid being exhausted at a flow velocity sufficient to penetrate the external medium.
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Specification