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[1]边博深,洪 钢*,李 宁,等.自然循环工况下倒U型管蒸汽发生器的一次侧流量反转机理[J].厦门大学学报(自然科学版),2017,56(04):499-504.[doi:10.6043/j.issn.0438-0479.201611025]
 BIAN Boshen,HONG Gang*,LI Ning,et al.Flow Inversion Mechanism in the Primary Side of an Inverted U-tube Steam Generator Under Natural Circulation[J].Journal of Xiamen University(Natural Science),2017,56(04):499-504.[doi:10.6043/j.issn.0438-0479.201611025]
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自然循环工况下倒U型管蒸汽发生器的一次侧流量反转机理(PDF/HTML)
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《厦门大学学报(自然科学版)》[ISSN:0438-0479/CN:35-1070/N]

卷:
56卷
期数:
2017年04期
页码:
499-504
栏目:
研究论文
出版日期:
2017-07-26

文章信息/Info

Title:
Flow Inversion Mechanism in the Primary Side of an Inverted U-tube Steam Generator Under Natural Circulation
文章编号:
0438-0479(2017)04-0499-06
作者:
边博深洪 钢*李 宁徐志刚张尧立
厦门大学能源学院,福建 厦门 361102
Author(s):
BIAN BoshenHONG Gang*LI NingXU ZhigangZHANG Yaoli
College of Energy,Xiamen University,Xiamen 361102,China
关键词:
自然循环 倒U型管蒸汽发生器 倒流 质量流量
Keywords:
natural circulation inverted U-tube steam generator(UTSG) reverse flow mass flow rate
分类号:
TL 33
DOI:
10.6043/j.issn.0438-0479.201611025
文献标志码:
A
摘要:
在自然循环工况下,倒U型管蒸汽发生器(UTSG)的进出口存在负压降,使得UTSG内的部分倒U型管易发生倒流现象.针对特定的UTSG,定量地建立倒U型管进出口压差随一次侧质量流量变化的水动力曲线,并采用最佳估算程序Relap5对UTSG进行建模分析.针对同一给定的自然循环工况,分别采用UTSG入口总质量流量从高到低和从低到高两种质量流量加载方式趋近.研究发现,自然循环工况的质量流量加载方式对UTSG倒流的发生有显著影响; 从低到高的质量流量加载方式会导致更多倒U型管发生倒流,产生更大的流动阻力; 在其他运行参数相同的情况下,UTSG倒流反转为正流的临界质量流量远高于正流反转为倒流的临界质量流量; 采用从高到低的质量流量加载方式到达自然循环工况更有利于避免UTSG倒流的发生.
Abstract:
For natural circulation,it is shown that the negative drop of pressure in the primary side of a inverted U-tube steam ge-nerator(UTSG)caused by the density difference of the fluid inside may result in reverse flows within some inverted U-tubes.A model of a given UTSG with nine parallel U-tubes is established using the best estimate code Relap5.Two conditions with different UTSG inlet mass flow rate loading methods are compared.Results show that mass flow rate loading methods significantly affect UTSG reverse flow phenomenon.Approaching the natural circulation by decreasing the inlet mass flow rate leads to less reverse flow U-tubes and flow resistance than increasing the inlet mass flow rate from zero.And the critical mass flow rate of flow inversion for the former condition is smaller than that for the later.In conclusion,reaching natural circulation by decreasing inlet mass flow rate of UTSG may avoid reverse flow.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2016-11-08 录用日期:2017-02-20
基金项目:福建省自然科学基金(2016J05137)
*通信作者:honggang@xmu.edu.cn
更新日期/Last Update: 1900-01-01