Heat Transfer to Supercritical Water in Smooth-Bore Tubes
Heat Transfer to Supercritical Water in Smooth-Bore Tubes
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DOI：
10.1115/1.3689139
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发表时间：
1965-11
影响因子：
--
通讯作者：
H. S. Swenson;J. Carver;C. Kakarala
中科院分区：
文献类型：
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作者：
H. S. Swenson;J. Carver;C. Kakarala
在压力(3300~6000PSIA)和本体温度(167~1068F)范围内，通过实验获得了超临界水在光管内流动的局部强迫对流换热系数。由于超临界流体的热物性在准临界范围内随温度的变化而迅速变化，常规的强迫对流关联式无法对数据进行拟合。然而，通过适当修改传统的无量纲模型以考虑边界层的物性变化，得到了完全发展的湍流流动的令人满意的关联式。在2951个数据点中，95%的数据点的相关性在±15%以内。实验还发现，该方程能很好地关联二氧化碳在各种条件下的超临界压力换热数据。
Local forced convection heat-transfer coefficients for supercritical water flowing inside smooth-bore tubes were obtained experimentally over a range of pressures (3300 to 6000 psia) and bulk temperatures (167 to 1068 F). Because the thermophysical properties of supercritical fluids change rapidly with temperature in the pseudocritical range, conventional forced convection correlations were unable to fit the data. However, a satisfactory correlation for fully developed turbulent flow was obtained by properly modifying the conventional nondimensional model to account for the physical property variation across the boundary layer. Out of 2951 data points, 95 percent lie within ±15 percent of the correlation. It was also found that the same equation correlated supercritical pressure heat-transfer data of carbon dioxide over a wide range of conditions with good accuracy.