内置式温差发电器热通道的数值模拟

Numerical simulations for hot channel of built-in thermoelectric generator

内置式结构在强化传热的同时将不可避免的对流体的流动产生阻力,为研究不同内置结构对温差发电器热端综合换热效果的影响,利用fluent商用软件对热通道的内流场和换热特性进行了数值模拟。详细介绍了从CAD软件辅助建模,网格划分和边界层定义到计算结果输出与后处理的整个过程,并通过计算得出了不同速度条件下光管、内置板以及内置粗糙肋板等热端模型的阻力与传热特性,并通过对计算结果的分析为热通道的结构优化指出了方向。

Built-in structure may strengthen heat transfer,however at the same time a resistance may occur inevitably to the flowing fluid.In order to research the impact of different internal structure to synthetical heat transfer of thermoelectric generator,the numerical simulation for the internal flow field and heat transfer characteristics of heat channel are done in it by adopting professional CDF software-Fluent.From assisted modeling based on CAD software、meshing,definition of boundary layer to the results output as well as post-treatment are all described in detail,and the resistance and heat transfer characteristics of hot models such as light tube,built-in board and built-in coarse rib are worked out under different speed,which results may indicate the direction for structure optimizing of hot channel.