• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Heat Transfer >Natural Convection Heat Transfer From Vertical 5×5 Rod Bundles in Liquid Sodium
【24h】

Natural Convection Heat Transfer From Vertical 5×5 Rod Bundles in Liquid Sodium

机译：垂直5×5棒束在液态钠中的自然对流传热

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Natural convection heat transfer from vertical 5×5 rod bundles in liquid sodium was numerically analyzed for two types of the bundle geometry (equilateral square array (ESA) and equilateral triangle array (ETA)). The unsteady laminar three-dimensional basic equations for natural convection heat transfer caused by a step heat flux were numerically solved until the solution reaches a steady-state. The phoenics code was used for the calculation considering the temperature dependence of thermophysical properties concerned. The 5×5 test rods for diameter (D = 7.6mm), heated length (L = 200mm), and L/d (=26.32) were used in this work. The surface heat fluxes for each cylinder were equally given for a modified Rayleigh number, (R_(f,L))_(ij) and (R_(f,L))_(5×5,S/D), ranging from 3.08x10~4 to 4.19×10~7 (q = 1×10~4-7×l0~6W/m~2) in liquid temperature (T_L = 673.15K). The values of SID, which are ratios of the diameter of flow channel for bundle geometry to the rod diameter, for vertical 5×5 rod bundles were ranged from 1.8 to 6 on each bundle geometry. The spatial distribution of local and average Nusselt numbers, (Nu_(av))_(ij) and (Nu_(av,B))_(5×5,S/D), on vertical rods of a bundle was clarified. The average value of Nusselt numbers, (Nu_(av))_(ij) and (Nu_(av,B))_(5×5,S/D), for the two types of the bundle geometry with various values of SID were calculated to examine the effect of the bundle geometry, SID, (R_(f,L))_(ij), and (R_(f,L))_(5×5,S/D) on heat transfer. The bundle geometry for the higher (Nu_(av,B))_(5×5,S/D) value under the condition of S/D = constant was examined. The correlations for (Nu_(av,B))_(5×5,S/D) for two types of bundle geometry above mentioned including the effects of(R_(f,L))_(5×5,S/D) and SID were developed. The correlations can describe the theoretical values of(Nuav£)_(5×5,S/D) for the two types of the bundle geometry at SID ranging from 1.8 to 6 within -12.64% to 7.73% difference.
机译：对于两种类型的管束几何形状（等边方阵（ESA）和等边三角形阵（ETA）），对液态钠中垂直5×5棒束的自然对流换热进行了数值分析。数值求解了由阶跃热通量引起的自然对流传热的非定常层流三维基本方程，直到溶液达到稳态。考虑到所涉及的热物理性质与温度的关系，将菲尼克斯代码用于计算。在这项工作中，使用了直径（D = 7.6mm），加热长度（L = 200mm）和L / d（= 26.32）的5×5测试棒。对于修改后的瑞利数（R_（f，L））_（ij）和（R_（f，L））_（5×5，S / D），均等地给出了每个圆柱体的表面热通量，范围为液体温度（T_L = 673.15K）为3.08x10〜4至4.19×10〜7（q = 1×10〜4-7×l0〜6W / m〜2）。对于垂直5×5棒束，SID值是束几何形状的流道直径与杆直径之比，在每个束几何形状上的SID值范围为1.8到6。阐明了束的垂直杆上局部和平均Nusselt数（Nu_（av））_（ij）和（Nu_（av，B））_（5×5，S / D）的空间分布。具有不同SID值的两种束几何的Nusselt数的平均值（Nu_（av））_（ij）和（Nu_（av，B））_（5×5，S / D）计算以检查束几何形状SID，（R_（f，L））_（ij）和（R_（f，L））_（5×5，S / D）对传热的影响。研究了在S / D =恒定的条件下，较高（Nu_（av，B））_（5×5，S / D）值的束几何。上面提到的两种类型束几何的（Nu_（av，B））_（5×5，S / D）的相关性包括（R_（f，L））_（5×5，S / D的影响）和SID的开发。这些相关性可以描述两种类型的束几何的（Nuav£）_（5×5，S / D）的理论值在SID范围为-12.64％至7.73％的范围内为1.8到6。

著录项

  • 来源
    《Journal of Heat Transfer》 |2017年第3期|92-102|共11页
  • 作者

    Koichi Hata; Katsuya Fukuda; Tohru Mizuuchi;

  • 作者单位

    Graduate School of Maritime Sciences, Kobe University, 5-1-1, Fukae-minami, Kobe, Hyogo 658-0022, Japan;

    Graduate School of Maritime Sciences, Kobe University, 5-1-1, Fukae-minami, Kobe, Hyogo 658-0022, Japan;

    Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号