抄録
In a future space infrastructure based on Orbit Transfer Vehicle, resupply technology of cryogenic fluid, especially heat management technology will be of importance. Our study is on forced convective boiling of cryogenic fluid (NL_2 as used) under microgravity. In the present experiments, we used a transparent heating tube, whcih can allow simultaneous temperature measuremnts and visual recordings. They were conducted under microgravity using Japan Microgravity Center as well as under 1G. We succeeded in measuring both heat transfer and quench front speed at the same time. Quench front speed under microgravity was about 1.2 times larger than under 1G for the same average mass velocity. As a result, heat transfer of cryogenic flow boiling is promoted under microgravity. Finally, outline of experimental project, which will be conducted by the author's group, is presented.
