| 摘要 |
PURPOSE:To contrive the elongation of life, by constituting the shell of a nose with herically wound cooling pipes, holding a gap between the cooling pipes adjacent to each other, and partially bonding them. CONSTITUTION:The shell of a nose is constituted with helically wound cooling pipes 11. Cooling water is introduced through an inlet 12 and discharged through an outlet 13. A gap between the parts of the helically wound cooling pipes 11 adjacent to each other is partially bonded by welding or the like to fix the shape. However, it is not necessary to adopt a pressure-resisting structure, since the nose is not of a gas sealed structure. In the nose of the combustor of this kind, a load of heat caused by convection and radiation from the interior of an oven is almost all absorbed in water flowing through the cooling pipes 11. In addition, thermal stress based on the temp. difference between the pipes 11 adjacent to each other can be released by the small expansion of each pipe, and the cooling can be performed by forcibly circulatively supplying water to obtain the certain effect of cooling.
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