Ducted fan of an aircraft, aircraft, and component thereof
AssigneeDr. Ing. h.c. F. Porsche Aktiengesellschaft
InventorBenjamin Bernard
Life of this patent
Estimating the term…
Abstract
A ducted fan of an aircraft includes a rotor-side fan and a stator-side duct that surrounds the rotor-side fan radially at the outside and defines a flow channel for air flowing via the fan. The stator-side duct has an inner wall that faces toward the rotor-side fan and which is perforated at least in certain sections. The stator-side duct has an outer wall that faces away from the fan. Between the inner wall and the outer wall of the stator-side duct, there are formed cavities which, forming sound-deadening resonators, are coupled via the perforated inner wall to the flow channel for the air flowing via the rotor-side fan. The cavities are filled, in a region which faces away from the inner wall and thus faces toward the outer wall, with activated carbon.
Claims20
A ducted fan of an aircraft, comprising:
- a rotor-side fan comprising rotor blades,
- a stator-side duct that surrounds the rotor-side fan radially at the outside and defines a flow channel for air flowing via the fan,
- wherein the stator-side duct has an inner wall that faces toward the rotor-side fan and which is perforated at least in certain sections,
- wherein the stator-side duct has an outer wall that faces away from the fan,
- wherein, between the inner wall and the outer wall of the stator-side duct, there are formed cavities which, forming sound-deadening resonators, are coupled via the perforated inner wall to the flow channel for the air flowing via the rotor-side fan,
- wherein the cavities of a first section of the certain sections are inclined with respect to a radial axis of the stator-side duct,
- wherein the cavities of the first section are filled, in a region which faces away from the inner wall and thus faces toward the outer wall, with activated carbon, and
- wherein the stator-side duct comprises a notched recess in the inner wall adjacent to the rotor-side fan, the notched recess being configured to receive a deformable body at least partially within the stator-side duct, and wherein the deformable body is configured to receive a force imparted by contact with the rotor blades during operation of the rotor-side fan such that the deformable body deforms and the rotor-side fan or the rotor blades are not damaged during operation.
A component of an aircraft, comprising:
- a perforated first wall,
- a second wall,
- a plurality of cavities formed between the first wall and the second wall and which, forming sound-deadening resonators, are coupled via the perforated first wall to the surroundings,
- wherein the cavities are filled, in a region that faces away from the first wall and faces toward the second wall, with activated carbon,
- wherein a first cavity of the plurality of cavities is inclined with respect to a second cavity of the plurality of cavities,
- wherein the perforated first wall comprises a notched recess in a central region of the perforated first wall, the notched recess being configured to receive a deformable body at least partially within the perforated first wall, the deformable body configured to receive a force imparted by contact with rotor blades during operation of a rotor-side fan such that the deformable body deforms and the rotor-side fan or the rotor blades are not damaged during operation.
Dependencies are inferred from the claim text.