Abstract: A heat exchange core according to an embodiment includes a plurality of first layers including a plurality of first flow paths, a first header connected to the plurality of first flow paths, and a plurality of second layers including a plurality of second flow paths and disposed alternately with the first layers in a layering direction. The first header includes a first main header extending in the layering direction and a first sub header provided on each of the plurality of first layers and connected to the first main header. End portions of some of the plurality of first flow paths are connected to the first main header, and end portions of a remainder of the plurality of first flow paths are connected to the first sub header.

Abstract: A gas turbine includes a rotor that has a rotor disk at each of a plurality of stages and a plurality of blades fixed to the respective stages, a casing, a plurality of vanes fixed to the casing, and an annular member fixed to a radially inner side of each of the vanes. The rotor disk has a seal arm. The annular member has an outer opposing portion that is radially opposed to the seal arm. The gas turbine further includes a seal fin that protrudes from the outer opposing portion toward the seal arm, a first cavity that is defined in the annular member and extends in a circumferential direction to straddle at least two of the vanes, a second cavity that is on a radially inner side of the first cavity, and a plurality of compressed air discharge paths that connect the first cavity to the second cavity.

Abstract: A compressor rotor includes a first outer cavity formed in a rotor main body and into which air on a high-pressure side of blades is to be introduced, a first inner cavity formed in the rotor main body on an inner side in a radial direction of the first outer cavity; and a first communication passage which connects the first outer cavity and the first inner cavity to each other in the radial direction of the first outer cavity. Along an entire length of the first communication passage from the first outer cavity to the first inner cavity, the first communication passage is inclined toward a forward side of a rotation direction of the rotor main body.

Abstract: A gas turbine includes the rotor that has a rotor disk at each of a plurality of stages and a plurality of blades fixed to the respective stages, a casing, the plurality of vanes fixed to the casing, and an annular member fixed to a radially inner side of each of the vanes. The rotor disk has a seal arm. The annular member has an outer opposing portion that radially opposed to a seal arm. The gas turbine further includes a seal fin that protrudes from the outer opposing portion toward the seal arm, a first cavity that is formed in the annular member and extends in a circumferential direction to straddle at least two vanes, a second cavity that is provided on the radially inner side of the first cavity, and a plurality of compressed air discharge paths that connect the first cavity to the second cavity.

Abstract: A compressor rotor includes a first outer cavity formed in a rotor main body and into which air on a high-pressure side of a rotating blades is introduced, a first inner cavity formed on an inner side in a radial direction of the first outer cavity in the rotor main body; and a first communication passage communicating the first outer cavity with the first inner cavity in the radial direction. Along the entirely length of the first communication passage from the first outer cavity to the first inner cavity, the first communication passage is inclined toward a forward side of a rotation direction of the rotor main body.

Abstract: A millimeter-wave transmitter-receiver uses an NRD guide as a fundamental configuration and includes a millimeter-wave signal oscillator, a pulse modulator, a circulator, an antenna and a mixer. In the millimeter-wave transmitter-receiver, a line length of a third dielectric guide is set so that ?=±? in which ? is a phase difference at a center frequency between a portion of a transmission millimeter-wave signal, which is reflected via a third dielectric guide on the leading end portion of the third dielectric guide and returned to leak to a third connecting portion of the circulator, and another portion of the millimeter-wave signal, which leaks from a first connecting portion to the third connecting portion of the circulator. It is possible to reduce the change in the mixer output and enhance the millimeter-wave transmission/reception performance.

Abstract: Provided is a millimeter-wave transmitting/receiving apparatus of pulse-modulation type in which pulse-modulated millimeter-wave signals for transmission are prevented from being outputted to a reception system due to inner reflection or other causes. Included are: an NRD guide (basic structure) formed of a dielectric line sandwiched between parallel plate conductors; a millimeter-wave signal oscillator; a pulse modulator; a circulator; a transmitting/receiving antenna; and a mixer. At the output end of the mixer is disposed a switching device which interrupts intermediate-frequency signals in an opened state, and, when a millimeter-wave signal for transmission from the pulse modulator enters a non-output state and the condition is stabilized, changes into a closed state to pass intermediate-frequency signals.

Abstract: A millimeter-wave transmitter-receiver uses an NRD guide as a fundamental configuration and includes a millimeter-wave signal oscillator, a pulse modulator, a circulator, an antenna and a mixer. In the millimeter-wave transmitter-receiver, a line length of a third dielectric guide is set so that ?=±? in which ? is a phase difference at a center frequency between a portion of a transmission millimeter-wave signal, which is reflected via a third dielectric guide on the leading end portion of the third dielectric guide and returned to leak to a third connecting portion of the circulator, and another portion of the millimeter-wave signal, which leaks from a first connecting portion to the third connecting portion of the circulator. It is possible to reduce the change in the mixer output and enhance the millimeter-wave transmission/reception performance.

Abstract: Provided is a millimeter-wave transmitting/receiving apparatus of pulse-modulation type in which pulse-modulated millimeter-wave signals for transmission are prevented from being outputted to a reception system due to inner reflection or other causes. Included are: an NRD guide (basic structure) formed of a dielectric line sandwiched between parallel plate conductors; a millimeter-wave signal oscillator; a pulse modulator; a circulator; a transmitting/receiving antenna; and a mixer. At the output end of the mixer is disposed a switching device which interrupts intermediate-frequency signals in an opened state, and, when a millimeter-wave signal for transmission from the pulse modulator enters a non-output state and the condition is stabilized, changes into a closed state to pass intermediate-frequency signals.