A centrifugal fan includes a motor, a support body, a rotating body, and a housing. The motor includes a rotor hub that rotates around a central axis extending up and down. The support body is fixed to the rotor hub and rotates together with the rotor hub. The rotating body is different from the support body in material and is a continuous porous body. The housing accommodates the rotating body, the support body, and the motor. The housing includes an air inlet open in an axial direction and at least one air outlet open in a radial direction. A radially inner surface of the rotating body opposes a radially outer surface of the rotor hub with a gap interposed therebetween. The rotating body is fixed to the support body to be replaceable.

A centrifugal fan includes a motor, a support body, first and second rotating bodies, and a housing. The motor includes a rotor hub. The support body is fixed to and rotates together with the rotor hub. The first and second rotating bodies are continuous porous bodies and are different in material than the support body. The first rotating body is located on an axially upper surface of the support body. The second rotating body is located on an axially lower surface of the support body. The housing accommodates the first and second rotating bodies, the support body, and the motor. The housing includes a first air inlet and an air outlet. A radially inner surface of the first rotating body opposes a radially outer surface of the rotor hub with a gap interposed therebetween.

A fan rotor blade comprises an outer covering member and a metal core body. The outer covering member is made of a composite material including a thermoplastic resin and reinforcing fibers. The outer covering member has a shape of a blade surface having a positive pressure surface and a negative pressure surface. The metal core body is arranged between the positive pressure surface and the negative pressure surface. The metal core body has a hollow structure.

A method for the additive manufacturing of a component includes: the additive building up of a structure from a base material for the component by an additive manufacturing method; the introduction, during the additive building up of the structure, of a porous auxiliary structure into an interior of the structure to define a functional area for the component in the interior; and the removing, in particular melting, of the porous auxiliary structure from the functional area by heating the auxiliary structure so that the functional area no longer has the auxiliary structure. A component is produced in accordance with the method and a corresponding device.

A gas turbine engine casing comprising: an inner circumferential wall; an outer circumferential wall spaced radially outwardly from the inner wall; wherein the inner and outer circumferential walls are formed by an axially repeating profile comprising an inner wall portion and an outer wall portion connected to one another by an intermediate portion, the axially repeating profile being arranged such that the inner wall portion abuts against and is connected to an adjacent inner wall portion to form the inner circumferential wall and the outer wall portion abuts against and is connected to an adjacent outer wall portion to form the outer circumferential wall.

A method of making a light weight component is provided. The method including the steps of: forming a metallic foam core into a desired configuration; inserting a pre-machined component into an opening in the metallic foam core; applying an external metallic shell to an exterior surface of the metallic foam core after it has been formed into the desired configuration and after the pre-machined component has been inserted into the metallic foam core; introducing an acid into an internal cavity defined by the external metallic shell; dissolving the metallic foam core; and removing the dissolved metallic foam core from the internal cavity, wherein the component and the external metallic shell are resistant to the acid.

A method of making a light weight housing for an internal component is provided. The method including the steps of: forming a first metallic foam core into a desired configuration; forming a second metallic foam core into a desired configuration; inserting an internal component into the first metallic foam core; placing the second metallic foam adjacent to the first metallic core in order to secure the internal component between the first metallic foam core and the second metallic foam core; and applying an external metallic shell to an exterior surface of the first metallic foam core and the second metallic foam core.

An airfoil for a gas turbine engine includes an airfoil section and a platform that has a non-gaspath side and a gaspath side from which the airfoil section extends. The platform is comprised of a sandwich composite that has first and second ceramic matrix composite (CMC) skins that each include at least one 2-D ceramic fiber ply. The first and second CMC skins are disposed, respectively, on the gaspath side and the non-gaspath side, and there is a cellular core disposed radially between the first and second CMC skins.

An assembly for mounting an auxiliary component to an engine case for a gas turbine engine includes a support bracket and a locator comprising a guide pin extending at least partially into a first aperture disposed in the support bracket, and a catcher pin extending at least partially into a second aperture disposed in the support bracket. A first frangible ring member is disposed between the support bracket and the catcher pin, wherein the frangible ring member comprises a porous metal material (e.g., frothed aluminum or thin-walled honey combed aluminum or steel). The first frangible ring member is configured to collapse to absorb energy while limiting system displacement during and post an overload event, thus reducing the energy transmitted to the auxiliary component (e.g., a gearbox housing). The guide pin can be fused such that the catcher pin limits movement of the auxiliary component when the guide pin breaks.

A component assembly includes a support structure, a ceramic substrate mounted to the support, and a foam-like coating adhered to one of the support structure and the ceramic substrate. The foam-like coating engages the other of the support structure and the ceramic substrate.