基于分形理论的非均匀介质相变过程传热特性研究

Study on heat transfer characteristics of phase change process in heterogeneous media based on fractal theory

中文关键词: 非均匀介质  分形  相变传热

英文关键词: heterogeneous media  fractal  phase change heat transfer

中文摘要:

      在生物医药、相变储能及冰蓄冷等领域存在大量非均匀介质相变现象，由于其结构复杂且伴随相变，为了揭示该过程中的传热规律，本文在对非均匀介质分形处理的基础上，结合相变传热实验，建立了三维分形非均匀介质相变传热模型，对不同边界条件下非均匀介质相变传热过程进行了分析研究，通过与实验结果比较，最大误差为4.3%，最小误差为1.5%，表明该模型可以有效获得相变过程中温度场的演变规律，能够为精确模拟和预测非均匀介质相变传热提供了指导和参考。

英文摘要:

      In biomedicine, phase change energy storage and ice storage, there are a large number of phase change phenomena in heterogeneous media. Due to its complex structure and accompanied by phase change, in order to reveal the heat transfer law in this process, based on the fractal treatment of heterogeneous media and combined with the phase change heat transfer experiment, a three-dimensional fractal phase change heat transfer model of heterogeneous media is established. The phase change heat transfer process in heterogeneous media under different boundary conditions is analyzed and studied. Compared with the experimental results, the maximum error is 4.3% and the minimum error is 1.5%. It shows that the model can effectively obtain the evolution law of temperature field in the phase change process, and can provide guidance and reference for accurate simulation and prediction of phase change heat transfer in heterogeneous media.