The present disclosure is directed to a method for rejuvenating a damaged coated component of a gas turbine engine. The method includes uninstalling the damaged coated component from the gas turbine engine. The method also includes isolating a first coated portion of the component of the gas turbine engine from a second coated portion of the component. In addition, the method includes simultaneously depositing a first coating material on the first coated portion of the component and a different, second coating material on the second coated portion of the component. The method also includes reinstalling the rejuvenated coated component into the gas turbine engine.

A fan assembly includes a fan having an outlet side, a fan duct positioned at the fan outlet side, and a hollow cylindrical chamber positioned within the fan duct, wherein the chamber has two closed ends, a cylindrical side wall, and an inlet port. The dimensions of the chamber are determined to suppress one or more noise frequencies emitted by the fan. In one example, one or more dimensions of a chamber disposed in an outlet duct of an axial fan is automatically adjusted to suppress a noise frequency that is a function of a rotational speed of the axial fan.

A diagonal fan having an electric motor, a housing and a diagonal impeller generating a diagonal flow which is deflected into an axial flow direction. The diagonal impeller has impeller blades, an air inlet and an air outlet, wherein the housing forms a flow channel for an airflow generated by the diagonal impeller, which has a non-rotationally symmetric axial section and a cylindrical axial section axially directly adjacent, as seen in the flow direction, wherein an air outlet-side radial outer end of the diagonal impeller is arranged in the cylindrical axial section of the flow channel of the housing and an air gap is provided between the radial outer end and the housing, and wherein the non-rotationally symmetric axial section of the flow channel is arranged in a region of the flow channel which is adjacent to the air-inlet side of the air gap in an axial plane with the diagonal impeller.

To enhance the containment capability of a ducted fan device at the time of FBO without hindering the weight reduction thereof, in a ducted fan device including a fan shroud (52) having an annular shape in plan view and an electric fan disposed at a center of the fan shroud (52) and having a fan blade (58, 64), the fan shroud (52) has a multilayer structure including a fiber layer (74) and a resin layer (70, 72), and has an opposing section (A) including a part that opposes a tip of the fan blade (58, 64) and a non-opposing section (B) that does not oppose the tips of the fan blade (58, 64), the opposing section and the non-opposing section being arranged in an axial direction, wherein in the non-opposing section (B), the fiber layer (74) is impregnated with part of resin forming the resin layer (70, 72), and in the opposing section (A), the fiber layer (74) is not impregnated with the resin forming the resin layer (70, 72).

A modular fan unit of a diagonal and/or axial fan having a housing that includes an inlet opening and an outflow opening. The housing accommodates a fan, that conveys the air at least in the axial direction and is divided perpendicularly to an axis (X-X) of the fan into at least two housing halves that are joined together. The housing forms a chamber in which the blades of the fan rotate around an axis and has a circumferential edge area in the vicinity of which the housing has a thickness B extending in the axis direction of the fan. A motor holding part has a dimension R as the maximum extension in the edge area and the chamber has an extension in the axis direction of the fan at a height of a dimension L, whereas the extension of the air inlet part has a dimension T in the area of the chamber. A ratio of the dimension B to the dimension R with respect to the ratio of the dimension L to the dimension T is within the range from 0.9 to 1.2. The noise emission of the fan during operation is minimized and the outer diameter of the modular fan unit is kept to a minimum.

An engine bleed air system of an aircraft, comprising a heat exchanger which comprises a rectangular core with a rectangular outlet section, a cylindrical outlet duct and a transition area between the rectangular outlet section of the rectangular core and the cylindrical outlet duct, and at least a downstream system, further comprising a flow deflector located at least in the cylindrical outlet duct, such that the outlet flow characteristics homogeneity are improved and a particular flow deflection and distribution of the outlet flow is achieved, avoiding the damage of the at least one downstream system. The invention also provides a method for homogenizing the temperature of the outlet flow of a heat exchanger outlet in an engine bleed air system of an aircraft.

A handheld blower includes a fan for generating an air flow, a motor for driving the fan to rotate about a central axis, a battery pack for supplying power to the motor, an air duct portion including an air duct, the air duct extending long the central axis, a coupling portion for coupling with the battery pack, and a connection portion for connecting the air duct portion with the coupling portion. The fan is received in the air duct. The air duct includes an air duct inlet and an air duct outlet which are respectively located at the two ends of the air duct. The air duct inlet is located between the air duct outlet and the coupling portion. The connection portion is provided with an air intake space located between the air duct inlet and the coupling portion. The air intake space is opened in a radial direction of the central axis.

An apparatus for cutting polymer includes a rotor having a base with a first side and a second side opposite the first side. The rotor includes an outer annular wall extending from the first side and defining a number of slots, an inner annular wall defining a number of slots and extending from the first side and surrounded by, and spaced apart from, the outer annular wall. The rotor also includes blades extending from the first side and positioned within the inner annular wall. A circular-shaped stator also defines a number of slots. At least a portion of the stator is positioned in a space between the outer annular wall and the inner annular wall of the rotor.

A blower, comprising: a housing comprising an air inlet, a motor disposed in the housing, an axial fan configured to be driven to rotate about a fan axis and generate an air flow by the motor, a blowing tube configured to be coupled to the housing and comprising an air outlet, a duct configured to guide the air flow to the air outlet, the housing and the blowing tube comprises an air passage which comprises an upstream region between the inlet and the axial fan and a downstream region between the axial fan and the air outlet, the motor is disposed in the upstream region and the duct is disposed in the downstream region.

The invention relates to a mid-frame (10) for a gas turbine, having at least one outer casing element (12) and having a plurality of duct segments (16), which are arranged in succession in the radial direction on the inside of the outer casing element (12) and in the peripheral direction of the casing element (12) and by which segments, in each case, at least one duct (18) through which a gas can flow is delimited at least in the radial direction at least partially, wherein a ring element (22) that is common to the duct segments (16) and is formed in one piece is provided, by means of which the duct segments (16) are held at the outer casing element (12).