用一维恒温相变界面模型研究毛细芯蒸发器温度场

STUDY ON THE TEMPERATURE FIELD OF CPL CAPILLARY WICK EVAPORATOR USING ONE-DIMENSIONAL INVARIABLE TEMPERATURE PHASE CHANGE INTERFACE MODEL

对ＣＰＬ毛细芯蒸发器提出了一维恒温相交界面模型：蒸发器壁、液体、蒸汽分别在横截面上的温度相同，即温度只有沿轴向才有变化；蒸发器壁、蒸汽分别和液体之间存在温度为饱和温度的汽液交界面，蒸发器壁、液体、蒸汽通过该交界面进行换热。根据此模型，应用带有特殊内热源项的一维能量守恒方程求解了温度场。在计算中估计并推荐了几个换热系数，给出边界条件后可得到蒸发器内温度场的数值解。蒸发器壁温的计算值与实验结果符合较好。

ne-dimensional invariable temperature phase change interface model on CPL capillary wick evaporator is presented as follows: the temperature of evaporator wall, liquid and vapor only change along the axis direction, there is a vapor-liquid interface with saturation temperature between the wall of evaporator, vapor and liquid, at with heat transfer occurs. Based on this model, the one-dimensional energy conservation equation with a special term of inner heat source is applied to solve the temperature profile. In the calculation, several heat transfer coefficients are evaluated and recommended. Giving the boundary conditions, the temperature field of the evaporator can be obtained numerically. The wall temperature values from numerical calculation have acceptable agreement with that of experimental results.