Abstract: An additive manufacturing method according to one or more embodiments includes a step for feeding a raw-material powder and forming a layer of the raw-material powder and a step for irradiating the layer with a light beam to cause the raw-material powder in the layer to melt and solidify, and thereby molding a part of a molded object. In the molding step, the beam diameter of the light beam on the molding surface is changed partway through molding, within the same layer.

Abstract: An electric propulsion device includes a hollow shaft having a shaft flow path, which extends in a direction of an axis, formed therein, a boss portion having a space formed therein, a plurality of blades having a blade flow path, which communicates with the space of the boss portion, formed therein, an electric motor, and a casing having an accommodation space, which communicates with the shaft flow path, formed therein. A suction port is formed to communicate between an outside of the casing and the accommodation space, in a position of the casing between each of the plurality of blades and the electric motor. A blowing port is formed to communicate between the blade flow path and the outside, in a region including an end portion of each of the plurality of blades on an outer side in the radial direction.

Abstract: A combustor cylinder includes a cylinder, and a fuel nozzle capable of injecting fuel into a combustion space of the cylinder. The cylinder has a plurality of cooling passages allowing cooling air to circulate therethrough, and a nozzle attachment penetration hole penetrating the cylinder from an outer circumferential surface of the cylinder to an inner circumferential surface of the cylinder. The fuel nozzle has a mixing passage, a fuel passage communicating with the mixing passage and capable of supplying the fuel to the inside of the mixing passage, and a connection passage communicating with the mixing passage and capable of supplying cooling air from a part of the plurality of cooling passages to the inside of the mixing passage. A position in the mixing passage communicating with the connection passage is on a side where a spout port of the mixing passage is present from a position where the mixing passage communicates with the fuel passage.

Abstract: A steam turbine according to at least one embodiment of the present disclosure includes an outer casing. The steam turbine according to at least one embodiment of the present disclosure includes an annular member, which is a single member provided radially inward of the outer casing, and formed in the annular member are a seal region in which a sealing device for sealing a gap between said member and the outer peripheral surface of a rotor is located, a rear-stage-stator-vane-holding region where a rear-stage stator vane is held, and an inner casing region connecting the seal region and the rear-stage-stator-vane-holding region. The steam turbine according to at least one embodiment of the present disclosure includes a front-stage vane ring that is attached to the annular member and that holds a front-stage stator vane.

Abstract: A fan device includes: a fan including a plurality of blades each extending in a radial direction relative to a rotation axis, the fan being configured to rotate about the rotation axis and generate an airflow; a rotor core provided outside in the radial direction of the fan; a stator core provided at a position facing the rotor core in the radial direction; a housing that forms an inner circumferential surface surrounding the fan about the rotation axis and that internally includes an accommodation space accommodating the rotor core and the stator core; and a compressor configured to compress air. The inner circumferential surface of the housing has a cylindrical surface and a nozzle surface whose diameter expands outward in the radial direction along the rotation axis in downstream in a flow direction of an airflow relative to the cylindrical surface.

Abstract: An ultrasonic testing device includes: a signal acquiring unit which receives a reflected echo signal relating to a reflected echo of ultrasonic waves from an object being inspected, a defect detecting unit which detects a defect of the object being inspected on the basis of the reflected echo signal, and a display unit which displays the detection result of the defect detecting unit. The defect detecting unit uses the maximum signal strength of the reflected echo signal exceeding a first threshold value to detect the defect. The first threshold value is a value with which the signal strength is less than the maximum signal strength of the reflected echo signal from the surface of the object, using as an evaluation range an interval between a position which is positioned a first distance from the surface of the object and a bottom surface of the object.

Abstract: A heat exchanger core includes: a first passage row which is formed by a plurality of first passages; a plurality of first dividing walls separating the plurality of first passages from each other; a second passage row which is disposed adjacent to the first passage row and is formed by a plurality of second passages; a plurality of second dividing walls separating the plurality of second passages from each other; and a partition wall located between the first passage row and the second passage row, and separating the plurality of first passages and the plurality of second passages. (a) The partition wall has a greater section modulus in an orthogonal direction than either the first dividing wall or the second partition, or (b) a constituent material of the partition wall has a greater breaking strength than a constituent material of either the first dividing wall or the second dividing wall.

Abstract: An outer diameter side magnet field pole piece assembly for a magnetic gear which is disposed on an outer circumferential side of a plurality of magnetic pole pieces disposed on an outer circumferential side of the outer diameter side magnet field pole piece assembly along a circumferential direction, includes: a plurality of magnetic pole pairs disposed on the outer circumferential side of the plurality of magnetic pole pieces along the circumferential direction; and a support member for supporting the plurality of magnetic pole pairs from the outer circumferential side. A space along an axial direction is formed in at least a part between an outer circumferential surface of each of the plurality of magnetic pole pairs and an opposite surface of an inner circumferential surface of the support member opposite to the outer circumferential surface of each of the plurality of magnetic pole pairs.

Abstract: An axial-gap coreless rotary electric machine includes rotors, stators, and a case. Armature coils of the stators include a first coil segment and a second coil segment facing the first coil segment. The case includes a first case segment and a second case segment facing the first case segment.

Abstract: An electrolytic cell according to the present disclosure includes: a first separator; a second separator disposed with a space between the second separator and the first separator; an ion exchange membrane disposed between the first separator and the second separator and configured to partition at least part of the space into an anode chamber and a cathode chamber; and a sealing part disposed between the first separator and the second separator, located on an outer side from an outer edge portion of the ion exchange membrane, and configured to seal the space.

Abstract: An electric fan includes: an electric motor that includes an output shaft extending along an axis line and a tubular housing centered on the axis line; an inner duct provided on a downstream side of the electric motor; a plurality of blades mounted on the output shaft; and a cooling member having a plurality of fins provided on an outer peripheral surface of the housing.

Abstract: A low toughness workpiece cutting apparatus, a low toughness workpiece manufacturing method and a low toughness workpiece manufacturing program for predicting an occurrence of defect and/or non-occurrence of defect before a cutting process of low toughness material. A defect prediction device is provided with a storage device, a processor and an interface. The storage device stores tool data that represent physical characteristics and a shape of a tool, cutting data that represent a group of parameters of a cutting process to be performed to a workpiece by use of the tool and material data that represent physical characteristics and a shape of the workpiece. The processor performs an analysis of deformation of the workpiece due to a cutting force and an analysis of fracture due to the deformation, and performs a prediction of an occurrence of defect and/or a non-occurrence of defect of the workpiece due to the cutting process.

Abstract: A monitoring device for a rotary machine is a monitoring device for monitoring a clearance of a rotary machine including a casing for housing a rotating part and a stationary part, including: at least one position sensor disposed outside the casing and configured to detect a relative position of the casing to the rotating part in a radial direction; and an estimation unit configured to obtain an estimated value of an internal clearance between the rotating part and the stationary part in the casing, based on a measured value detected by the at least one position sensor.

Abstract: A method of attaching/detaching a catalytic unit according to an embodiment is a method of attaching/detaching a catalytic unit accommodated in a reactor housing of a catalytic reactor, including a step of passing the catalytic unit through a gas inlet formed at a top portion of the reactor housing to attach or detach the catalytic unit to or from the reactor housing having a cylindrical shape extending in a vertical direction and configured such that a gas having a gauge pressure of 0.2 Mpa or more is introduced thereto.

Abstract: A method of evaluating performance of a gas turbine includes: acquiring static operation determination data and acquiring index value data; storing the acquired data; determining whether or not the gas turbine is in a static operation state in accordance with whether or not the static operation determination data for each of a plurality of times in a period in the past set in advance from a determination time among the static operation determination data for each of the plurality of times stored in the storing of the data entering a range of a variation width set in advance; and acquiring the evaluation index value using the index value data at the determination time at which the gas turbine is determined to be in the static operation state. The static operation determination data includes a cavity temperature between an inner shroud of a turbine vane and a rotor shaft.

Abstract: This high-frequency hardening apparatus is provided with: an induction heating coil which has a U-shaped part that sandwiches a turbine blade, a pair of linear parts, and a connection part connecting the U-shaped part and the linear parts; a temperature detection unit which detects, in a non-contact manner, temperature around the induction heating coil; a moving mechanism which relatively moves the turbine blade and the induction heating coil in the direction of blade height; an electrical current supply unit which supplies a high-frequency electrical current to the induction heating coil; and a control device which has an electrical current control unit that, on the basis of a detection value provided by the temperature detection unit, controls the magnitude of the high-frequency electrical current supplied from the electrical current supply unit such that the detection value will not exceed a predetermined temperature.

Abstract: A raised structure for reducing frictional drag due to viscosity of a flow toward an object in a direction defining an acute angle with a leading edge of the object. The raised structure includes raised bodies configured to be provided on a surface of the object at the leading edge on a downstream side of a stagnation point of the flow. A height of each raised body changes along a convex curve, and the raised bodies are arranged in an array to define a first uneven shape changing periodically in a first cross section configured to have a constant distance from the stagnation point and be orthogonal to the surface, and a second uneven shape changing in a second cross section configured to be orthogonal to a line composed of the stagnation point and the first cross section, the second uneven shape having concave and convex portions that change periodically.

Abstract: A flow channel forming plate has a gas path surface which comes into contact with combustion gas, an opposite gas path surface which faces a side opposite to the gas path surface, an end surface formed at a circumferential edge on the gas path surface, and a lateral passage formed between the gas path surface and the opposite gas path surface and in which cooling air flows. The end surface has a rear end surface, a front end surface, and a lateral end surface. The lateral passage has, along the gas path surface and the lateral end surface, a main passage portion extending in a direction in which the lateral end surface extends, and one or more narrow passage portions extending from an end of the main passage portion on a downstream side toward the rear end surface and opening on the rear end surface.

Abstract: A delay time calculation method includes: a step of calculating a plurality of segment movement delay times respectively indicating times required for the fuel gas to pass through a plurality of segments; a step of calculating a total movement delay time which is a time required for the fuel gas to move through the fuel line from the measurement point to the supply target device, by adding up the plurality of segment movement delay times; and a step of acquiring the delay time based on the total movement delay time. The step of calculating the plurality of segment movement delay times includes acquiring the segment movement delay time based on a correlation between the segment movement delay time acquired in advance and a fuel flow rate supplied to the supply target device, for each of the plurality of segments.

Abstract: A method for forming a coating film on a sliding surface of a sliding member includes: a first contact step of supplying a lubricant composition containing tungsten disulfide to the sliding surface to bring the tungsten disulfide into contact with the sliding surface; and a second contact step of bringing a silane compound that is dialkoxysilane, trialkoxysilane, tetraalkoxysilane, or a polymer or a copolymer of dialkoxysilane, trialkoxysilane, and tetraalkoxysilane into contact with the sliding surface.