| 摘要 |
PROBLEM TO BE SOLVED: To provide a technology for heating gas by fission reaction, which is suitable for space propulsion. SOLUTION: Gas, for example hydrogen, of relatively low pressure is heated directly by fissile piece emitted from a thin layer of a fissile for example 242mam, deposited on an inner wall of a chamber cooled to a typical temperature of about 1000/1500 deg.K. The gas is discharged as a capillary flow from a wall of a cylindrical tube. A temperature thereof is elevated gradually to reach to an equibrium value of 9500 deg.K. The FF heating and radiation cooling are balanced at the point. Average specific volume power imparted to the hydrogen gas is brought into a high value of 0.66 MWatt/g in a relatively moderate surface power density in a foil of 200 Watt/cm2. Heating power upto a level of MWatt per 1 gram of the gas is possible thereby in an allowable foil surface heating. This heating method is applicable for a rocket engine for deep space propulsion.
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