抄録
In boiling heat transfer under microgravity, the heat transfer performance falls down significantly. Many recent microgravity experiments on pool boiling have shown that the critical heat flux is 100∿300 percent higher than the widely accepted theories which the critical heat flux decreases proportionally to the one quarter power of the gravity. Present paper introduces recent studies on pool boiling in microgravity including authors' experiments on subcooled pool boiling of water. In the authors' experiments, a thin stainless plate was physically bumed out by an altemative current in subcooled water under reduced gravity practiced by a parabolic flight of aircraft and the contact area of bubbles with ITO coated heating surface was observed in microgravity practiced by a drop shaft facility. Bubble behaviors and critical heat flux were discussed compared with the higher critical heat flux in the microgravity experiments.
