| 自然循环条件下蒸汽发生器U型传热管倒流分布特性的实验研究 |
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| 引用本文： | 唐瑜,徐建军,谢添舟,周慧辉,黄彦平,谭曙时.自然循环条件下蒸汽发生器U型传热管倒流分布特性的实验研究[J].核动力工程,2018,39(4):43-47. |
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| 作者姓名： | 唐瑜 徐建军 谢添舟 周慧辉 黄彦平 谭曙时 |
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| 作者单位： | 中国核动力研究设计院中核核反应堆热工水力技术重点实验室 |
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| 摘 要： | 在自然循环工况下蒸汽发生器一次侧入口流量为0.4~0.7 kg/s的参数范围内，开展了蒸汽发生器U型传热管倒流特性实验。针对9种不同长度的U型传热管，分别设置9个倒流监测点，获得了倒流在不同长度U型管中的分布特性。基于传热管压降实测数据和守恒原理，获得了蒸汽发生器一次侧的倒流总流量以及倒流U型管的数目。结果表明，在本实验参数范围内，约有61%的U型管发生倒流，使传热管正向流通面积减小为原来的39%。倒流同时导致正流流量增加60%，与不发生倒流的情况相比，U型管平均流速增大4.2倍。
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| 关 键 词： | 自然循环 蒸汽发生器 U型传热管 倒流特性 |
Experimental Study on Distribution Characteristics of Flow Reversal in U-Tubes of Steam Generator under Natural Circulation |
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| Abstract: | An experiment on flow reversal in U-tubes of steam generator (SG) has been made within the range of flow rate 0.4~0.7 kg/s under natural circulation. Nine pairs of monitoring points corresponding to nine groups of U-tubes with different length were installed to obtain the distribution characteristics of flow reversal. Based on the conservation laws and test data, total flow rate and the number of U-tubes of reverse flow in the primary side of SG were obtained. The results show that the flow reversal occurs in about 61% of U-tubes, which reduce the flow area of heat transfer tubes to 39%. Because of the flow reversal, the flow rate of the forward flow rise by 60%, and the speed of the flow in U-tubes increase to 4.2 times in contrast with that without flow reversal. |
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