换热器整体模型的数值研究方法

利用各向异性多孔介质和换热器核心模型建立了适用于各种换热器的换热器整体模型。计算结果与实验值基本符合，验证了模型的正确性。与以前文献中采用的数值模拟方法相比，本文提出的方法可以同时预测换热器管壳程的流场、温度场，而且支持对多管壳程等复杂换热设备的模拟，也适用于具有多个热源或冷却流的传热设备以及由多台传热设备组成的换热器组。本文结合其他学者提出的“单元流道”模型，提出将“单元流道”计算的结果作为换热器整体模型的计算依据，解决了换热器新结构整体模拟的基本数据来源的问题。对于一些具有非周期模型条件的换热器，本文提出的方法依然适用。

A Integral Numerical Method of Heat Exchangers

The integral model was presented with the concept of anisotropic porosities and the model of heat exchanger core. A 3D model result of flow and heat transfer were computed and compared with experimental result of a heat exchanger. It confirms correctness of this model that computing result accorded with the experimentation basically. Differing from the former literatures, this method could forecast the flowing field and temperature field in tube side and shell side. This method could apply to multi-tube-shell-channel heat exchangers or heat exchanger groups. Relating to the unit-flow-channel presented by others, the unit-flow-channel result became the basic data of the integral model and resolved the difficulties lacking basic data of new structural heat exchanger. This method applies to non-periodic model heat exchangers too.