对蒸发曳力模型的修正  

Improvements of Evaporation Drag Model

作　　者：李小燕[1] 杨燕华[1] 徐济鋆[1] 

机构地区：[1]上海交通大学核科学与系统工程系,200030

出　　处：《核动力工程》2004年第3期230-232,245,共4页Nuclear Power Engineering

基　　金：国家自然科学基金项目(50046026)

摘　　要：建立了一套研究高温小球落水的工程热物理基础实验装置。在此装置上进行了一系列实验,证实 了蒸发曳力模型的可信性,同时也发现其局限性。对蒸发曳力模型进行了修正,增加考虑了辐射热在液体内 部和汽液交界面的分布及对流换热对小球落水阻力的影响,扩大了蒸发曳力模型的适用性。A special observable experiment facility is established, and a series of experiments are carried out on this facility by pouring one or several high-temperature particles into a water pool. The experiment verifies the evaporation drag model, which believe the non-symmetric profile of the local evaporation rate and the local density of the vapor would bring about a resultant force on the hot particle so as to resist its motion. However, in Yang's evaporation drag model, radiation heat transfer is taken as the only way to transfer heat from hot particle to the vapor-liquid interface and all of the radiation energy is deposited on the vapor-liquid interface, thus contributing to the vaporization rate and mass balance of the vapor film. So, the heat conduction and the heat convection are taken into account in improved model. At the same time, the improved model given by this paper presented calculations of the effect of hot particles temperature on the radiation absorption behavior of water.

关 键 词：修正的蒸发曳力模型 高温颗粒与冷却剂相互作用 辐射热 对流换热 

分 类 号：TL33[核科学技术—核技术及应用]