Heat transfer to low temperature helium and cooling of superconducting apparatuses (Japanese text)

This thesis described the basic experimental researches on the thermal engineering needed for the design of cryogenic apparatuses using superconducting properties. The contents are as follows: (S1) Introduction-Background, Conventional studies, and Object; (S2) Correlations of nuclear boiling heat transfer for cryogenic fluids; He, Ne, Ar, N{dollar}sb2,{dollar} O{dollar}sb2{dollar}, and room temperature fluids; R11 and water; (S3) Enhancement of boiling heat transfer to liquid helium; (S4) Boiling and free-convention heat transfer to liquid helium under centrifugal force fields; (S5) Forced-convection heat transfer to supercritical helium under centrifugal force fields; (S6) Indirect cooling of a small superconducting magnet; (S7) Thermal design of a superconducting generator rotor; (S8) Conclusions.; In S2 to S5, whether low temperature helium has a peculiar heat transfer properties in comparison with another fluids or not is experimentally studied through the experiments on various heat transfer modes. The results revealed the universality of the experimental or theoretical expressions for room temperature fluids by introducing slight corrections.; In S6 and S7, the thermal design method for the real machines is presented. Especially, cooling or a superconducting rotor for an electric generator is studied through a model experiment.