Japan Aerospace Exploration Agency

www.jaxa.jp
Sagamihara, Japan

The Japan Aerospace Exploration Agency , or JAXA, is Japan's national aerospace agency. Through the merger of three previously independent organizations, JAXA was formed on 1 October 2003. JAXA is responsible for research, technology development and the launch of satellites into orbit, and is involved in many more advanced missions, such as asteroid exploration and possible manned exploration of the Moon. Its motto is One JAXA and its corporate slogan is Explore to Realize . Wikipedia.

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Patent
Kawasaki Jukogyo Kabushiki Kaisha and Japan Aerospace Exploration Agency | Date: 2017-06-28

A fuel injection device for a gas turbine combustor includes: a pilot fuel injector; a main fuel injector; a plurality of main fuel injection holes arranged in the main fuel injector to inject the fuel rearward; a main fuel injection nozzle to guide the fuel to a main air passage, protruding rearward from a circumference of the main fuel injection hole into the opening formed in a passage wall that forms the main air passage; a heat-shielding casing covering the main fuel injector; and a ring member interposed in an axial gap between the passage wall and the heat-shielding casing. The ring member covers a through-hole gap between the main fuel injection nozzle and a through-hole in the heat-shielding casing, and has a purge passage communicated with the opening to introduce air into the main air passage.


Patent
Kawasaki Jukogyo Kabushiki Kaisha and Japan Aerospace Exploration Agency | Date: 2017-06-28

A fuel injection device includes: a pilot fuel injector disposed at a radially center position; a main fuel injector having an annular shape and disposed so as to encircle the pilot fuel injector; a fuel injection portion that injects a fuel into a combustion chamber; a fuel supply unit that supplies a fuel to the fuel injection portion; a fuel introduction portion secured to a combustor housing that has the combustion chamber therein and introduces a fuel into the fuel supply unit; and an injector housing that is supported by the fuel introduction portion and covers front portions of the pilot fuel injector and the main fuel injector. The fuel supply unit has a base supported by the fuel introduction portion, and an annular body supported by the injector housing via a support pin so as to be radially movable relative to the injector housing.


A vapor jet system enabling to continuously jet out vapors for a long time while suppressing cavitation. With a vapor jet system comprising: a liquid storage part for separately storing two or more kinds of mutually insoluble liquids; a jet orifice for jetting out vapors generated by vaporization of the two or more kinds of liquids inside of the liquid storage part; and a jet control part for controlling the jetting out of the vapors from the jet orifice, jetting out of the vapors is started from a state where the pressure in the space storing the vapors in the liquid storage part is higher than the saturated vapor pressure in any of the two or more kinds of liquids. Alternatively, with a vapor jet system comprising: a fluid storage part storing one kind of liquid and at least one kind of inactive gas having a composition different from the liquid; and a similar jet orifice and a similar jet control part, jetting out of the vapors and the at least one kind of inactive gas is started from a state where the pressure in the space storing the vapors in the fluid storage part is higher than the saturated vapor pressure in the liquid.


Patent
Japan Aerospace Exploration Agency | Date: 2017-02-22

A vapor jet system includes a container for storing a sublimable solid, the container having a vapor discharge port for discharging vapor generated by sublimation of the sublimable solid; a member having an opening for jetting out the vapor to the outside of the vapor jet system; a vapor flow path between the vapor discharge port and the opening; and a filter for preventing passage of the sublimable solid and allowing the vapor to pass through, the filter being provided to the vapor flow path.


Patent
Japan Aerospace Exploration Agency | Date: 2015-04-16

A vapor jet system includes a container for storing a sublimable solid, the container having a vapor discharge port for discharging vapor generated by sublimation of the sublimable solid; a member having an opening for jetting out the vapor to the outside of the vapor jet system; a vapor flow path between the vapor discharge port and the opening; and a filter for preventing passage of the sublimable solid and allowing the vapor to pass through, the filter being provided to the vapor flow path.


Patent
California Institute of Technology and Japan Aerospace Exploration Agency | Date: 2016-11-10

A wheel includes a circular wheel main body and at least one grouser. The at least one grouser is provided along an outer circumference of the wheel main body and has a contact surface capable of drawing a first tangent line. The first tangent line is inclined opposite to a rotational direction of the wheel main body from the center line of the wheel main body.


Patent
Kawasaki Jukogyo Kabushiki Kaisha and Japan Aerospace Exploration Agency | Date: 2017-02-17

A fuel injection device for a gas turbine combustor includes: a pilot fuel injector; a main fuel injector; a plurality of main fuel injection holes arranged in the main fuel injector to inject the fuel rearward; a main fuel injection nozzle to guide the fuel to a main air passage, protruding rearward from a circumference of the main fuel injection hole into the opening formed in a passage wall that forms the main air passage; a heat-shielding casing covering the main fuel injector; and a ring member interposed in an axial gap between the passage wall and the heat-shielding casing. The ring member covers a through-hole gap between the main fuel injection nozzle and a through-hole in the heat-shielding casing, and has a purge passage communicated with the opening to introduce air into the main air passage.


Patent
Kawasaki Jukogyo Kabushiki Kaisha and Japan Aerospace Exploration Agency | Date: 2017-02-17

A fuel injection device includes: a pilot fuel injector disposed at a radially center position; a main fuel injector having an annular shape and disposed so as to encircle the pilot fuel injector; a fuel injection portion that injects a fuel into a combustion chamber; a fuel supply unit that supplies a fuel to the fuel injection portion; a fuel introduction portion secured to a combustor housing that has the combustion chamber therein and introduces a fuel into the fuel supply unit; and an injector housing that is supported by the fuel introduction portion and covers front portions of the pilot fuel injector and the main fuel injector. The fuel supply unit has a base supported by the fuel introduction portion, and an annular body supported by the injector housing via a support pin so as to be radially movable relative to the injector housing.


Provided are an orbit descent method and system for space debris, capable of collision avoidance operation and re-entry control without a removal satellite of complicated construction and heavy weight, and an orbit changing method and system for an artificial satellite, based on the same principles. Provided are an orbit descent method and its associated system. The method includes the steps of: bringing an artificial satellite extendably holding an electroconductive tether near to space debris orbiting around a heavenly body; attaching one end of the electroconductive tether to the space debris by an electroconductive tether attachment mechanism; extending the electroconductive tether, with the other end thereof held by the artificial satellite, by an electroconductive tether extension mechanism, and causing the orbits of the integrated and orbiting artificial satellite, electroconductive tether and space debris to descend toward the heavenly body, by action of an electromagnetic effect of a magnetic field around the heavenly body upon the electroconductive tether; and changing the orbital motions under control by the artificial satellite. The system is configured to perform the steps. Provided are an orbit changing method and system for an artificial satellite, based on the same principles.


Patent
Tsukada Medical Research Co., Japan Aerospace Exploration Agency and Mitsubishi Group | Date: 2017-09-20

There is provided a liquid supply apparatus eliminating the need for a power supply, having relatively light weight and small footprint, and ensuring a stable liquid supply. The liquid supply apparatus includes a first support member, a second support member, a balloon having one end supported by the first support member and the other end supported by the second support member, and a casing having a constant longitudinal length. The balloon is disposed in the casing and is configured so as to be able to hold a liquid therein and discharge the liquid therefrom. When the balloon holds the liquid, the one end and the other end of the balloon are positioned in the case.

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