微重力下冷凝及传热研究进展OA

This review systematically summarizes recent advances in filmwise and dropwise condensa-tion under microgravity,elucidating two-phase heat transfer mechanisms and gravitational influence pat-terns.For condensing heat transfer in tubes,gravity-independent criterion numbers(Bond number,Froude number,etc.)are used to determine whether gravity affects heat transfer,and the effect of gravi-ty can be attenuated by increasing the mass flow rate of the vapor and reducing the tube diameter.In microgravity environments,dropwise condensation can be achieved through vapor flow acceleration com-bined with functional surfaces and air-blowing techniques for condensate removal.Current experimental studies on microgravity condensation remain limited due to challenges in obtaining sustained microgravi-ty conditions.The paper emphasizes the necessity of conducting long-term condensation experiments uti-lizing orbital platforms like the China Space Station and International Space Station to address data re-producibility issues,investigate gravity-dependent mechanisms,and provide theoretical foundations for space two-phase thermal management systems.