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公开(公告)号：JP2001132542A
公开(公告)日：2001-05-15
申请号：JP31894299
申请日：1999-11-09
Applicant: NAT AEROSPACE LAB , ISHIKAWAJIMA HARIMA HEAVY IND
Inventor： SHINNO MASAYUKI , MORI HATSUO , WATANABE HIROYUKI
Abstract: PROBLEM TO BE SOLVED: To lighten a weight of the engine system, take driving force and specific impulse large, improve engine performance, and stably supply laser beam from a laser light source without being influenced by the weather, in a laser heat propulsive engine. SOLUTION: Pellet shaped ice or slush state water is used for fuel, laser beam 6 is supplied from the outside to fuel through condensing optical systems 7, 8 with a good efficiency, high energy is supplied, fuel is directly injected from a nozzle 5 in a plasma gas condition of a high temperature, and thereby, large thrust and high specific impulse are obtained. It is thus possible to stably supply high energy without being influenced by the weather by using high output repetitive pulse laser which is mounted in an aircraft flying above the equator as a light source of the laser beam.
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公开(公告)号：JPH11177156A
公开(公告)日：1999-07-02
申请号：JP36362597
申请日：1997-12-16
Applicant: NAT AEROSPACE LAB
Inventor： NODA YASUTOSHI , KOU YASUO , MORIYA SHINICHI , SHINNO MASAYUKI
Abstract: PROBLEM TO BE SOLVED: To enhance thermoelectric conversion characteristics by performing pressure deformation or extrusion plastic working of a fused or sintered thermoelectric semiconductor material while heating electrically. SOLUTION: A metal powder material 6 for one electrode of a thermoelectric conversion element, a sintered or fused mass of thermoelectric semiconductor material 5, and a metal powder material 6 for the other electrode are arranged sequentially on a punch 4 in the cavity 1 of a die 2. Punches 3, 4 are then pressed each other or one punch is pressed against the other thus compressing the powdery electrode material 6 and the semiconductor material 5. Under that state, a large current is fed between the conductive punches 3, 4 and hot working is performed. Alternatively, a punch 23 is pressed toward the outlet 24 of a die 22 to extrude the thermoelectric semiconductor material 5 while softening. In this regard, a large current is fed between the conductive punches 23, 22 to generate heat and the material is extruded by applying a pressure while controlling the working temperature.
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公开(公告)号：JPH1065222A
公开(公告)日：1998-03-06
申请号：JP23258396
申请日：1996-08-14
Applicant: NAT AEROSPACE LAB
Inventor： NODA YASUTOSHI , KOU ENSEI , TANJI YASUNORI , KUMAGAI TATSUO , SHINNO MASAYUKI , TADA YASUO
Abstract: PROBLEM TO BE SOLVED: To enable a thermoelectric conversion device to be surely manufactured which is long in service life and high in reliability. SOLUTION: A sintered or a molten thermoelectric semiconductor material 4 is prepared. The material 4 and electrode materials 5 are pressed against each other and plasma-bonded together by applying a large current, whereby a thermoelectric conversion main body 11 formed of the material 4 and electrodes 12 are integrated into one piece for the formation of a thermoelectric conversion device 10.
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公开(公告)号：JPH06330816A
公开(公告)日：1994-11-29
申请号：JP11696193
申请日：1993-05-19
Applicant: NAT AEROSPACE LAB , MITSUBISHI HEAVY IND LTD
Inventor： SHINNO MASAYUKI , TOGAWA MORIHITO , MIKI YOICHIRO
IPC: F02K9/64
Abstract: PURPOSE:To provide a high temperature combustion engine of which pressure loss for the flow of cooling medium is small, heat resisting performance is heightened, and the combustion chamber having cooling passages therein is provided. CONSTITUTION:A plurality of cooling passages extending in the axial direction of a combustion chamber are formed in an inner cylinder 1 forming the combustion chamber C of a rocket engine. Fuel to be burned in the rocket engine is introduced to the cooling passages from an inlet piping 8, through an inlet manifold 3. The fuel flowing in the cooling passages flows out from an outlet piping 9 through an outlet manifold 4, and led to the rocket engine combustion chamber from the inlet of an injection device 10. Triangular fins are extendingly arranged along the passages in the cooling passages. Bubbles generated on the heat transfer surface of the cooling passage quickly break away by arranging the fins, so as to restrain film boiling on the heat transfer surface.
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公开(公告)号：JPH0566176A
公开(公告)日：1993-03-19
申请号：JP22805991
申请日：1991-09-09
Applicant: NAT AEROSPACE LAB , MITSUBISHI HEAVY IND LTD
Inventor： KUMAGAI TATSUO , SAKURANAKA NOBORU , UEDA SHUICHI , SAITO TOSHIHITO , WAKAMATSU YOSHIO , SHINNO MASAYUKI , ADACHI NAOTO , NAGATA SATOSHI , SAKAMOTO AKIRA
Abstract: PURPOSE:To restrain oxidation of a panel-shaped test piece from its end face and to enable miniaturization of the test piece by fixing the panel-shaped test piece in the direction of flow, and extending the surface of the test piece in the longitudinal or cross direction. CONSTITUTION:In a test piece holder 2 a panel-shaped test piece 1 is installed between two holders 2 each shaped like an extended test piece 1, and the test piece 1 is fixed within the gas flow of a high temperature gas generator 3 and in the direction of the gas flow. Because the boundary layer of the high temperature gas flow first develops on the holders 2, then transfers itself into turbulent flow, and becomes a sufficiently developed turbulent flow boundary layer on the test piece 1, no great change in heat conduction due to the transition of the boundary layer occurs on the test piece 1 and the test piece 1 is uniformly heated. Since heat stagnation points exit only on the holders 2, the rate of uneven heating of the test piece 1 can be lowered. Also, the holders 2 prevent the end portion of the test piece 1 from being exposed at its face to the high temperature gas flow, thereby preventing oxidation of the test piece 1 from its end face.
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Patent Agency Ranking
公开(公告)号：JPH0494926A
公开(公告)日：1992-03-27
申请号：JP21294890
申请日：1990-08-10
Applicant: NAT AEROSPACE LAB , KAWASAKI HEAVY IND LTD
Inventor： SHINNO MASAYUKI , KUMAKAWA AKINAGA , WAKAMATSU YOSHIO , NAMIKATA SHUNICHI , FUJIOKA JUNZO , HINO HARUKI , MATSUMURA HIROYUKI
Abstract: PURPOSE:To eliminate gravity segregation becoming trouble in the case of producing the tilting functional material by a melting method by constituting the surface of one side of only powdery material having large thermal conductivity and mixing the material excellent in heat resistance with the former so that the mixing ratio of the latter is gradually increased to ward the opposite side and melting this mixture in the gravity-free environment, cooling and solidifying it. CONSTITUTION:Powder such as CU and T1 large in thermal conductivity is utilized for a first material. Powder or fiber such as oxide, carbide and nitride excellent in heat resistance is utilized for a second material. For example, copper is regulated to powder of 1mum mean particle diameter and silicon oxide is regulated to powder of 0.1mum mean particle diameter. A volatile binder is mixed with the powdery raw material and this mixture is supplied to a quantitative mixer 2. This quantitative mixer is controlled by a computer 3 to continuously change the mixing ratio in the direction of board thickness. The this mixture is filled in a mold 4 and the binder is vaporized and removed. The mixture is pressurized by a press and transferred into a glass capsule. A plurality of molded raw materials obtained thereby are arranged into a cartridge by pinching ceramic wool between these molded raw materials while holding the mixture in the glass capsule. These are placed in a space craft and heated at 1200 deg.C for about one hour in the gravity-free environment of the space. Copper powder is melted and cooled to room temp.
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公开(公告)号：JPH0417638A
公开(公告)日：1992-01-22
申请号：JP12034190
申请日：1990-05-09
Applicant: KAWASAKI HEAVY IND LTD , NAT AEROSPACE LAB , MIYAMOTO YOSHIO
Inventor： NAMIKATA SHUNICHI , FUJIOKA JUNZO , HINO HARUKI , MATSUZAKI YUJI , SHINNO MASAYUKI , KUMAKAWA AKINAGA , WAKAMATSU YOSHIO , MIYAMOTO YOSHIO
IPC: C04B35/622 , B22F3/14 , B22F3/15 , C04B35/645 , C22C1/04 , C22C29/00 , C22C29/18 , C22C32/00
Abstract: PURPOSE:To attain at least any of the lightening in weight, the improvement of the degree of the sintering and the improvement of the workability in a functionally gradient material by combining any of ceramics, metals or intermetallic compounds with intermetallic compounds. CONSTITUTION:At the time of manufacturing a functionally gradient material, e.g. of an MoSi2(C11b type intermetallic compounds)-TiAl(L10 type intermetallic compounds), one end in the axial direction in a cylindrical vessel is filled with Ti-Al and the other end is filled with a gradient compsn. in such a manner that the mixed powder of Mo and Si is arranged in the molar ratio of 1:2, which is thereafter subjected to precompacting by cold isostatic pressing to obtain a raw material green compact 1. This green compact 1 is inserted into a glass container (capsule) 2 so that the axial direction of the green compact 1 will be approximately vertical, which is thereafter vacuum-sealed into a hot isostatic pressing apparatus 3, and the raw material powder or the like in the capsule is brought into reaction with or is sintered under the condition of pressurizing.
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公开(公告)号：JPH03146606A
公开(公告)日：1991-06-21
申请号：JP28427089
申请日：1989-10-31
Applicant: WATANABE RYUZO , KAWASAKI AKIRA , NAT AEROSPACE LAB , ISHIKAWAJIMA HARIMA HEAVY IND
Inventor： WATANABE RYUZO , KAWASAKI AKIRA , SHINNO MASAYUKI , YUKI MASAHIRO , MURAYAMA TOSHIICHI , IRISAWA TOSHIO
Abstract: PURPOSE:To easily manufacture a gradated functional material constituted with intermediate layer continuously varying composition thereof by repeatedly executing heating and sintering process, in which powder is arranged on surface of a base material and irradiated with laser beam, at the suitable sintering temp. according to the composition of each arranged powder. CONSTITUTION:For example, at the time of manufacturing the gradated functional material, in which the front face is ceramic 11 and the back face is metal 12 and the intermediate layer is continuously varied with these compositions, at first, the base material 13, which can be separated with the metal 12, is prepared. The metal powder 14 is thinly arranged on this base material 13 with a nozzle 15 and irradiated with the laser beam 16 and heated and sintered at the suitable sintering temp. of the metal powder 14 to form sintered layer having 100% metal. Successively, the powder mixing the ceramic powder 13 into the metal powder 14 on the sintered layer is arranged with the nozzle 15 and heated and sintered at the suitable temp. with the laser beam 16. The operation is repeatedly executed while gradually increasing the mixed rate of ceramic powder 21 and finally, the sintered layer having 100% ceramic is formed. By this method, the gradated functional material composed of the ceramic 11 at the first face and the metal 12 at the back face is easily obtd.
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公开(公告)号：JPH0360413A
公开(公告)日：1991-03-15
申请号：JP19259189
申请日：1989-07-27
Applicant: NIPPON OIL CO LTD , NAT AEROSPACE LAB
Inventor： KAMIMURA SEIICHI , HAYATA YOSHIHO , IDO TAIJI , HISATE YUKINORI , KONO TAKESHI , HIRAI TOSHIO , SASAKI MAKOTO , SHINNO MASAYUKI
Abstract: PURPOSE:To improve oxidation and cracking resistances by forming a second coating film of ceramics on a carbon-based first coating film formed on the surface of a carbon-carbon composite material and varying the thermal properties of the carbon in the first coating film. CONSTITUTION:A carbon-based first coating film is formed on the surface of a carbon carbon composite material by vapor phase decomposition. A second coating film of ceramics or ceramics combined with carbon is formed on the first coating film by vapor phase decomposition and the thermal and/or mechanical properties of the carbon in the first coating film are continuously or discontinuously varied. A carbon material having superior oxidation resistance and hardly causing cracking even under thermal load is obtd.
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公开(公告)号：JPS6082603A
公开(公告)日：1985-05-10
申请号：JP18880583
申请日：1983-10-07
Applicant: NAT AEROSPACE LAB , MASUDA YOSHIMICHI , WATANABE KAGOZOU , TAKEGAWA JIYUNJIROU , SUMITOMO ELECTRIC INDUSTRIES
Inventor： SHINNO MASAYUKI , YATSUYANAGI NOBUYUKI , KUMAKAWA AKINAGA , SUZUKI AKIO , SASAKI MASAKI , GOMI HIROMI , SAKAMOTO HIROSHI , MASUDA YOSHIMICHI , WATANABE KAGOZOU , TAKEGAWA JIYUNJIROU , DOI YOSHIHIKO , KUROISHI ATSUSHI , TAKEDA YOSHINOBU , OCHI SHIGEKI
Abstract: PURPOSE:To obtain a coolant passage with low friction pressure drop and good cooling efficiency by using a low-melting point alloy as a filler for a groove in the manufacture of an external cylinder of a liquid rocket combustor having a grooved cooling wall. CONSTITUTION:An external cylinder of a rocket combustor is manufactured through a grooved cooling wall providing stage, a stage for filling a filler into the groove, a stage for compression molding metallic powder into a specified thickness around an internal cylinder filled with the filler in the groove, and a stage for sintering the compression molded body. In this case, a low-melting point alloy such as Wood's metal is used as the filler. Accordingly, since the filler is not deformed during compression molding, the cross-sectional shape of the groove is not changed and the sintered surface is also smoothed. The coolant passage with low friction pressure drop and good cooling efficiency can be obtained in this way.
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