A gas turbine engine has an engine static structure. At least one component rotatable relative to the engine static structure about an engine axis of rotation. A fan is coupled to at least one component for rotation about the engine axis of rotation. An actuator is mounted to the engine static structure, wherein the actuator is activated to prevent the fan from rotation and is inactivated to allow the fan to rotate. A method for preventing rotation of a fan in a gas turbine engine is also disclosed.

An abradable seal comprises an organic matrix composite comprising an additive and an organic component, the additive is configured to prevent adhesion of the organic component onto an abrasive blade tip.

A water dispersing system (WDS) that allows a selectable quantity of water to be dispersed into an environment. The WDS utilizes a fan and a water supply assembly. The fan has a frame inside of which are two rotating blades, and preferably a stand. The water supply assembly includes a reservoir, a water tube, and a water dispersing head. Water is gravity fed from the reservoir, through the water tube and out of the head. Water from the head is directed into the first fan's rotating blades. Once the water hits the blades, the water is re-directed back out through a front grill on the fan. The second fan blades project air outward. The amount of water that comes from the WDS can be selectably chosen, from a light mist to a heavier spray, and the temperature of the water can be lowered by placing ice into the reservoir with the water. An excess water basin catches any water that drips downward from the blades.

A fan blade has a tip, a root, a pressure side and a suction side. The fan blade comprises a laminate body defined by a plurality of plies comprising reinforcement fibres. The angles of the fibres in the plies are arranged such that the laminate body is unbalanced.

The present disclosure provides a liner system for a turbine engine. The liner system includes a fan track liner panel that is positionable axially within a casing that is arranged around a rotatable fan and that forms a blade containment zone. The fan track liner panel is further positionable radially outward of the rotatable fan. The fan track liner panel includes a body that extends a length of the fan track liner panel from a fore portion of the fan track liner panel to an aft portion of the fan track liner panel. The fan track liner panel is configured to be directly secured to the casing by a fastener that extends through only part of the body and entirely through the casing within the blade containment zone such that the aft portion of the fan track liner panel abuts an interior surface of the casing.

A fan assembly for a gas turbine engine includes a fan including a plurality of fan blades. Each fan blade extends radially outwardly from a fan hub to a blade tip. The plurality of blade tips define a fan diameter. A nacelle surrounds the fan and defines a fan inlet upstream of the fan, relative to an airflow direction into the fan. The nacelle has a forwardmost edge defining an inlet length from the forwardmost edge to a leading edge of a fan blade of the plurality of fan blades. A ratio of inlet length to fan diameter is between 0.20 and 0.45. A nacelle inner surface defines a nacelle flowpath. The nacelle flowpath has a convex throat portion and a concave diffusion portion between the throat portion and the leading edge of the fan blade at a bottommost portion of the nacelle.

A heating device for heating a component in a turbo molecular pump for exhausting a gas includes a heat transfer member, a heater, a first seal member and a second seal member. The heat transfer member is provided in an opening of a housing of the turbo molecular pump and has one end fixed to the component and the other end exposed to an outside. The heater in the heat transfer member heats the component through the heat transfer member. The first seal member is provided between the heat transfer member and the opening along an outer peripheral surface of the heat transfer member. The second seal member between the heat transfer member and the opening is located close to the component compared to the first seal member. The second seal member suppresses movement of radicals in a gas into a space between the heat transfer member and the opening.

A ceiling fan with an oscillating mechanism includes a clutch member for adjusting the angle of oscillation according to a user's need. When the motor is actuated, the rotating torque induced by the motor and the transmission mechanism is less than the rotational resistance of the clutch member such that the motor may drive the fan to oscillate. Further, when the user applies an external rotational force greater than the rotational resistance of the clutch member, the user can swing the fan to any angle as desired without rotating or shifting other members except the fan and the fan suspension tube. In this manner, undesired damage of the mechanism or motor due to inappropriately applied external force can be avoided efficiently.

A fan structure having integrated rotor impeller, and methods of producing the same are provided. The fan structure includes a fan housing that encircles a longitudinal axis, and defines an airflow direction from an inlet side to an exit side. The integrated rotor impeller structure is disposed to rotate within the fan housing. The integrated rotor impeller structure includes (a) a cylindrical rotor shell being annular about the longitudinal axis, and having a shell length, and (b) an axis rod coaxial with the longitudinal axis, and having an axis rod length of less than or equal to the shell length. An airflow annulus is created therebetween. A blade is disposed within the airflow annulus to extend radially from the external surface of the axis rod to the inside surface of the the cylindrical rotor shell. One or more magnets are integrated within the integrated rotor impeller structure.

Methods are provided for manufacturing a component. In one method, first material is cast into a first body. At least a portion of the first body is machined. Second metal material is cast onto at least the machined portion of the first body to form a monolithic second body. A first portion of the second body is formed by the first metal material. A second portion of the second body is formed by the second metal material. The second metal material is different from the first metal material.