FORCED CONVECTIVE HEAT-TRANSFER TO SUPERCRITICAL WATER FLOWING IN TUBES
FORCED CONVECTIVE HEAT-TRANSFER TO SUPERCRITICAL WATER FLOWING IN TUBES
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DOI：
10.1016/0017-9310(72)90148-2
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发表时间：
1972-01-01
影响因子：
5.2
通讯作者：
NISHIKAW.K
中科院分区：
文献类型：
--
作者：
YAMAGATA, K;YOSHIDA, S;NISHIKAW.K
对超临界水在水平管内和垂直管内流动的传热进行了实验研究。获得了压力从226到294巴、整体温度从230到540°C、热通量从116到930 kW/m2和质量速度从310到1830 kg/m2 s的一组综合数据。由于超临界流体的物理性质在拟临界区域随温度迅速变化，因此传热系数显示出取决于热通量的不寻常行为。在低或modetate相对于流量的热通量，一个令人满意的关联式，得到了合理的预测，以及增强传热系数附近的伪临界点。阐明了在高热通量下发生的传热恶化的几个特征，并确定了与流量有关的恶化发生的极限热通量。
Experimental investigations were made of heat transfer to supercritical water flowing in a horizontal tube and vertical tubes. A comprehensive set of data was obtained for pressures from 226 to 294 bar, bulk temperatures from 230 to 540°C, heat fluxes from 116 to 930 kW/m2and mass velocities from 310 to 1830 kg/m2s. Because the physical properties of supercritical fluids change rapidly with temperature in the pseudocritical region, the heat transfer coefficients show unusual behavior depending upon the heat flux. At low or modetate heat fluxes relatively to the flow rate, a satisfactory correlation was obtained, which predicts reasonably well the enhanced heat transfer coefficients near the pseudocritical point. The several characteristics of the deterioration in heat transfer which occurs at high heat fluxes were clarified, and the limit heat flux for the occurrence of the deterioration was determined in connection with the flow rate.