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US 2011/0030336 A1Published application
Coannular ducted fan
AssigneeThe Boeing Company
InventorsMark S. Kuehn, Daniel A. Nyhus, Timothy G. Brewer
Life of this patent
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Abstract
Secondary air flow is provided for a ducted fan having an engine core driving a fan blisk. The fan blisk incorporates a set of thrust fan blades extending from an outer hub and a set of integral secondary flow blades extending intermediate an inner hub and the outer hub. A nacelle provides a first flow duct for the thrust fan blades and a secondary flow duct carries flow from the integral secondary flow blades.
Claims20
A ducted fan comprising:
- an engine core;
- a fan blisk connected to the engine core, the fan blisk incorporating
- a set of thrust fan blades extending from an outer hub;
- a set of integral secondary flow blades extending between an inner hub and the outer hub;
- a nacelle providing a first flow duct for the thrust fan blades;
- and,
- a secondary flow duct carrying flow from the integral secondary flow blades.
4 more elements
A turbine ducted fan comprising:
- a turbine engine core including a power shaft;
- a fan blisk attached to the power shaft and spaced from the engine core, the fan blisk incorporating
- a set of thrust fan blades extending from an outer hub;
- a set of integral secondary flow blades extending intermediate an inner hub and the outer hub, the flange spanning the inner hub;
- a nacelle providing a first flow duct for primary air flow from the thrust fan blades;
- and,
- a plurality of interconnected base gores for stator blades extending to the nacelle, the base gores interconnected to a cylindrical stator hub as a shroud aligned with the outer hub and carrying secondary air flow from the integral secondary flow blades, the blisk flange and shroud forming a plenum;
- an air diffuser extending from the shroud;
- and,
- a concentric spinner having an inner cap and a concentric outer semi-toroidal cap engaging the inner and outer hub for secondary air flow.
7 more elements
An air vehicle comprising:
- a turbine engine core including a power shaft;
- a fan blisk attached to the power shaft and spaced from the engine core, the fan blisk incorporating
- a set of thrust fan blades extending from an outer hub;
- a set of integral secondary flow blades extending intermediate an inner hub and the outer hub, the flange spanning the inner hub;
- a nacelle providing a first flow duct for primary air flow from the thrust fan blades;
- and,
- a secondary flow duct carrying flow from the integral secondary flow blades for use in a system of the air vehicle.
4 more elements
A method for providing secondary airflow from a ducted fan comprising:
- forming thrust blades in a fan blisk between an outer hub and a nacelle inner radius;
- forming secondary flow blades between an inner hub and the outer hub;
- mounting the fan blisk on a fan shaft;
- and
- providing a nacelle for flow from the thrust blades;
- and,
- providing a secondary flow path for flow from the secondary flow blades.
4 more elements
Dependencies are inferred from the claim text.