摘要:
PROBLEM TO BE SOLVED: To provide a new hot joining method for integrating an inner cylinder and an outer cylinder made of metal and concentrically overlapped without requiring large-scale facilities in an HIP method, and also to provide a method enabling joining of materials having high rigidity. SOLUTION: The joining method of an inner cylindrical member and an outer cylindrical member comprises a step for processing the outer surface of the inner cylindrical member to be bonded into a design shape, a step for mounting a brazing material on the outer surface of the inner cylindrical member, a step for fitting the inner cylindrical member in the outer cylindrical member to be bonded, a step for covering the outer cylindrical member with a holder comprising a C/C material, a step for heating the inner cylindrical member, the outer cylindrical member, and the holder which are in a nested state to a temperature above the melting temperature of the brazing material and applying contacting pressure caused by the difference of thermal expansions of the inner cylindrical member, the outer cylindrical member, and the holder, and a step for taking out the members from the holder after cooling them. COPYRIGHT: (C)2010,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a combustor improved in the rate of transmitting the heat from combustion gas to a peripheral wall of a combustion chamber. SOLUTION: This combustor includes a plurality of injectors capable of injecting oxidizer and fuel from an injection surface thereof, a combustion chamber 3 formed of the injection surface and a peripheral wall 32 stood from the injection surface and for generating combustion gas as propelling power by mixing the oxidizer and the fuel injected from the plurality of injectors for combustion, a cooling passage 33, which is provided in the peripheral wall 32 and in which the fuel before combustion flows, a plurality of fins 38 provided in the inner wall surface of the peripheral wall 32, and a plurality of gas diffusing members 40 for diffusing the combustion gas, which flows in the inner wall surface of the peripheral wall 32, into the circumferential direction of the inner wall surface of the peripheral wall 32. COPYRIGHT: (C)2009,JPO&INPIT
摘要:
PROBLEM TO BE SOLVED: To provide a non-automatic firing propellant injection and ignition system suitable for use in a relatively small rocket engine. SOLUTION: A bipropellant injector has first and second injector elements 130, 24 and a spark excitation assembly 100. The first injector element 130 has a conductive layer 146 electrically connected to the spark excitation assembly and a non-conductive layer 148 arranged on an outer portion of the conductive layer. The second injector element 24 is formed of electric conductive material and has a through opening 132 which is in fluid communication with a combustion chamber. An end 138 of the first injector element is arranged at the opening 132 or near the opening 132. The spark excitation assembly 100 can generate an electric arc between the conductive layer 146 of the first injector element 130 and the second injector element 24. COPYRIGHT: (C)2008,JPO&INPIT