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本文介绍了试验迴路装置和同心套管试验段,在p为50—60公斤/厘米~2,t_f为55—106℃以及Re_f为(3.1—12.2)×10~4,Pr_f为1.65—3.10,q为4.50×10~5和7.35×10~5大卡/米~2·小时的条件下,测定了水在短同心套管内的湍流放热系数.并用通用准则关系式进行了数据处理,得出了轴向平均放热系数与轴向局部放热采数的计算公式.推荐公式的分散度不超过±8.5%.
In this paper, the experimental circuit device and the concentric casing test section are introduced. The experimental section is in the range of 50-60 kg / cm 2 for p, 55-106 ° C for t_f and (3.1-12.2) x 10-4 for Pr_f, 1.65-3.10 for Pr_f, The turbulent exothermic coefficient of water in a short concentric tube was measured under the condition of q of 4.50 × 10 ~ 5 and 7.35 × 10 ~ 5 kcal / m ~ 2 h, and the data processing was carried out by the general criterion relation The formula for calculating the axial average exothermic coefficient and the axial local exothermic mining number is derived, and the degree of dispersion of the recommended formula does not exceed ± 8.5%.