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矩形窄通道内CHF点的数值模拟.pdf

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2016年 7 月 第 3 7 卷 学报 (自然科学版) July 2016 Yol. 37 J O U R N A L O F J I A N G S U U N I V E R S I T Y ( N a t u r a l Science Edition) doi : 10.3969/j .issn . 1671 -7775.2016.04.005 矩形窄通道内C M 点的数值模拟 吴鸽平,陈 冲 ,武继光,龚 俊 (江苏大学能源与动力工程学院,江苏镇江21213) 摘要:采用Y 0 F 多相流模型,运用 CFD 软件对矩形窄通道内临界热流密度(C /F )进行了数值模 拟.分析了通道内流型变化,并绘制流型图.对影响临界热流密度的因素进行了研究,与相同工况下 试验结果进行了对比,证明了模拟结果的可靠性.结果表明 :与常规通道相比,矩形窄通道内流型只 有泡状流、弹状流和环状流,受通道尺寸限制,汽泡生长、合并不充分;临界热流密度随质量流速的 增加而增加,随 的 增 大 不 断 减 小 ;入口过冷度对于临界热流密度影响可忽略;在相同的通道尺 寸及入口条件下,上升流的临界热流密度比下降流略大,并随着质量流速增加,流向影响逐渐缩小. 关键词:矩形窄通道;临界热流密度; CFD ; 流型;数值模拟 中图分类号:TL334 文献标志码: A 文章编号:1671 -7775(2016)04 -0399 -05 引文格式:吴鸽平,陈 冲 ,武继光,等.矩形窄通道内C f f 点的数值模拟[J ].江苏大学学报(自然科学版),216,37 (4 ) 3 9 - 403. Numerical simulation of CHF in narrow rectangular channel WUGeping ,CHENChong ,WUJiguang ,GONGJun ( School of Energy and Power Engineering , Jiangsu University , Zhenjiang , Jiangsu 212013 , China ) Abstract : Based on YOF multiphase model , the critical heat flux ( CHF) was numerically simulated by CFD software. The flow regime transition was analyzed to draw the flow pattern maps. The factors on critical heat flux were summarized , experimental facts to verify the simulation reliability. The results show that only bubbly flow , slug flow and annular flow are appeared in the narrow channel , and the growth and the coalescence of bubble are restricted by channel size , which are slightly different with conventional channels. Th
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