US 2023/0417146 A1 · PNEUMATICALLY VARIABLE TURBINE NOZZLE

Abstract

A pneumatically variable nozzle vane is disclosed that is capable of performing the same or similar function as a mechanically variable nozzle vane. Within its core, each pneumatically variable nozzle vane may comprise one or more cavities in fluid communication with one or more outlets to eject a gas from the nozzle vane into a flow path of working fluid through the nozzle. Each cavity may be shaped to match an internal pressure gradient to the external pressure gradient of the nozzle vane. The gas may be ejected as a curtain, substantially perpendicular to the flow path through the nozzle, to thereby manipulate the flow of a working fluid through the nozzle in a similar manner as a mechanically variable nozzle vane. In an embodiment, each nozzle vane may have two cavities supplying outlets on both the pressure-side and suction-side of the nozzle vane.

Claims20

Dependent claims

A nozzle vane comprising:

an inlet through a first radial end of the nozzle vane;
a cavity within a core of the nozzle vane, the cavity extending from the inlet towards a second radial end of the nozzle vane, wherein a cross-sectional area of the cavity, along a radial axis of the nozzle vane, decreases from the first radial end to the second radial end;
and
an outlet through a side surface of the nozzle vane, the outlet in fluid communication with the cavity.

1 more element

A nozzle vane comprising:

a forward inlet through a first radial end of the nozzle vane;
a forward cavity within a core of the nozzle vane, the forward cavity extending from the forward inlet towards a second radial end of the nozzle vane, wherein a cross-sectional area of the forward cavity, along a radial axis of the nozzle vane, decreases from the first radial end to the second radial end;
a forward outlet through a suction-side surface of the nozzle vane;
a forward channel connecting the forward cavity to the forward outlet;
an aft inlet through the first radial end of the nozzle vane;
an aft cavity within a core of the nozzle vane, the aft cavity extending from the aft inlet towards the second radial end, wherein a cross-sectional area of the aft cavity, along the radial axis, decreases from the first radial end to the second radial end;
an aft outlet through a pressure-side surface of the nozzle vane;
and
an aft channel connecting the aft cavity to the aft outlet.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application

17/847,600Filed 23 Jun 2022

Published

28 Dec 2023

Term ends

Not estimatedThe source records don’t support an estimate.

Classification13 codes

F01D 9/041
Forming ring or sector: using blades
F01D 9/065
Fluid supply conduits to nozzles or the like: fluid supply or removal conduits traversing the working fluid flow, e.g. for lubrication-, cooling-,…
F01D 5/145
Shape, i.e. outer, aerodynamic form: means for influencing boundary layers or secondary circulations
F01D 9/02
Stators: nozzles; Nozzle boxes; Stator blades; Guide conduits , e.g. individual nozzles

Pneumatically variable turbine nozzle

Life of this patent

Pneumatically variable turbine nozzle

Life of this patent

Abstract

Claims20