Using proper orthogonal decomposition to solve heat transfer process in a flat tube bank fin heat exchanger
Using proper orthogonal decomposition to solve heat transfer process in a flat tube bank fin heat exchanger
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DOI：
10.26804/ager.2017.03.03
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发表时间：
2017-12
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影响因子：
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通讯作者：
Ye-Feng Wang;Xintong Xia;Yi Wang;Liangbi Wang;W. Hu
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文献类型：
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作者：
Ye-Feng Wang;Xintong Xia;Yi Wang;Liangbi Wang;W. Hu
本征正交分解（POD）降阶模型通过降低物理问题的维数和重构物理场，可以节省计算时间。特别适用于工程中大型复杂问题，如地热利用、海洋能开发、矿产开采、多相流动和结构复杂的传热。本文采用POD降阶模型计算了一种翅片管换热器内的传热。采用有限体积法（FVM）的计算结果作为快照样本。采用奇异值分解方法对样本进行分解，得到一系列基于采样条件的基和相应的系数。利用这些系数，采用插值法计算预测条件的系数。并直接利用基和插值系数重建了物理场。在计算翅片管换热器的传热单元时，选择了空气侧雷诺数、横管间距和翅片间距作为变量。POD方法的计算结果与有限体积法的计算结果吻合较好。此外，本文提出的POD降阶模型在精度、适用性和计算速度方面都优于有限体积法。引用自：Wang，Y.，Xia，X.，王玉，应用正交分解法求解扁管束翅片换热器的传热过程。地球能源研究进展，2017，1（3）：158-170，doi：10.26804/ager.2017.03.03.
Proper orthogonal decomposition (POD) reduced-order model can save computing time by reducing the dimension of physical problems and reconstructing physical fields. It is especially suitable for large-scale complex problems in engineering, such as ground heat utilization, sea energy development, mineral exploitation, multiphase flow and flow and heat transfer with complex structure. In this paper, the POD reduced-order model was used to calculate the heat transfer in a flat tube bank fin heat exchanger. The calculating results of the finite volume method (FVM) were adopted as the snapshot samples. Singular value decomposition method was used to decompose the samples to obtain a series of bases and corresponding coefficients on sampling conditions. With these coefficients, interpolation method was used to calculate the coefficients on predicting conditions. And the physical field has been reconstructed using the bases and the interpolated coefficients directly. In the calculation of heat transfer unit of flat tube fin heat exchanger, air-side Reynolds number, transverse tube spacing and the fin spacing were chosen as the variables. The results obtained by the POD method are in good agreement with the results calculated by the FVM. Moreover, the POD reduced-order model presented in this paper is more advantageous in comparison with the FVM in terms of accuracy, suitability, and computational speed. Cited as : Wang, Y., Xia, X., Wang, Y., et al. Using proper orthogonal decomposition to solve heat transfer process in a flat tube bank fin heat exchanger. Advances in Geo-Energy Research, 2017, 1(3): 158-170, doi: 10.26804/ager.2017.03.03.