| 摘要 |
PURPOSE:To prevent pressure increase in a combustion device and improve the efficiency and safety of the device by a method wherein third spiral flow path is provided in a combustion space and an air-tight gas sealed external space member, communicated with the other end of the flow path, is provided in the device. CONSTITUTION:An internal pipe 1a, operating as the metallic first spiral flow path, and an external pipe 1b, operating as the second spiral flow path, are provided to flow water to generate steam. Further, the third spiral flow path 4, whose one end is closed in the combustion space 3, is provided in the combustion space 3 and the other end thereof is communicated with the air-tight gas sealed external space member 5 outside the combustion space 3. In case the device is used for generating steam in the power system or the like of underwater sailing body, the device is filled with a solid propellant and alkaline metal, thereafter, oxidizer is injected toward the inside of the combustion space 3 to react the alkaline metal and heat water, flowing through the internal pipe 1a and the external pipe 1b, by the heat amount generated in this case, whereby steam is generated efficiently. |
