论文部分内容阅读
建立了分析潜热型功能热流体的层流强化传热的新模型.该模型的主要特征是:(1)应用新推导的潜热型功能热流体定压比热公式;(2)考虑了真实的相变传热过程,即,相变微胶囊与单相工作流体间换热,壁面与两相混合流体间换热;(3)用新建立的轴对称双倒易边界元和有限差分联合的数值方法求解该数理方程.新模型的可靠性用已有实验结果进行了验证.得到了一些新的物理结果,如定压比热在空间与时间随相变传热过程变化的特征,捕获了相变界面随时间推进图像,等等,还数值分析了影响潜热型功能热流体强化传热的几个主要物理因数,对该功能流体强化传热机理获得了一些新认识.
A new model for the analysis of the enhanced heat transfer in the laminar flow of a latent heat functional fluid is established. The main features of this model are: (1) applying the new derived latent heat functional fluid constant pressure specific heat equation; (2) considering the real Phase transition heat transfer process, that is, heat exchange between the phase change microcapsule and the single-phase working fluid and heat exchange between the wall surface and the two-phase mixed fluid; (3) Using the newly established axisymmetric double reciprocal baryte and the finite difference joint The numerical method is used to solve the mathematical equation.The reliability of the new model is validated by the existing experimental results, and some new physical results are obtained, such as the change of specific heat of constant pressure in the space-time heat transfer process with time, The phase change interface propels the image over time, and so on. Several key physical factors affecting the enhanced heat transfer of the latent heat functional fluid are also numerically analyzed. Some new understandings have been obtained for this mechanism.