低Reynolds数条件下水流纵掠长冰柱沿方位角传热特性

doi:10.11949/j.issn.0438-1157.20171238

化工学报 ›› 2018, Vol. 69 ›› Issue (6): 2424-2431.DOI: 10.11949/j.issn.0438-1157.20171238

低Reynolds数条件下水流纵掠长冰柱沿方位角传热特性

孟凡康, 褚琦, 王锦力

辽宁工程技术大学土木工程学院, 辽宁阜新 123000

收稿日期:2017-09-11 修回日期:2017-09-30 出版日期:2018-06-05 发布日期:2018-06-05
通讯作者: 孟凡康
基金资助:
辽宁省教育厅项目（LJ2017QL035）；辽宁省科学事业公益研究基金项目（20170044）；河北省重点研发计划项目（18394313D）。

Heat transfer characteristics of water flowing along icicle at low Reynolds number

MENG Fankang, CHU Qi, WANG Jinli

School of Civil Engineering, Liaoning Technical University, Fuxin 123000, Liaoning, China

Received:2017-09-11 Revised:2017-09-30 Online:2018-06-05 Published:2018-06-05
Supported by:
Supported by the Foundation of Liaoning Educational Committee (LJ2017QL035), the Research Fund Project of Scientific Enterprise in Liaoning Province(20170044) and the Key Research and Development Project of Hebei Province(18394313D).

摘要/Abstract

摘要：

通过实验研究了低Reynolds数条件下水流纵掠长冰柱过程的沿方位角相界面移动规律及传热特性。改变水流速度、水流温度、冰柱尺寸及冰柱初始温度等控制参数，采用非接触测量方法获得了冰柱融化图像，基于影像实验数据与冰柱相界面传热系数之间的映射关系，分析了沿方位角对流传热系数等传热参数的变化规律。结果表明：各测量点的沿方位角Nusselt数不同，随着融化过程的进行，各测量点的沿方位角Nusselt数值均先增大后减小，整个融化过程中间某处存在最大值；其余实验控制参数不变的条件下，沿方位角对流传热系数均随着水流速度或水流温度的增大而增加；获得了水流纵掠冰柱融化过程Nu_φ、Gr、Re、Pr、Ste及φ之间的关联式。

关键词: 水流纵掠冰柱, 相变, 对流, 传热

Abstract:

The heat characteristics and moving regulation of phase change interface during the progress of water flowing along icicle at low Reynolds number are investigated. The mapping relationship between the experimental data and the heat transfer coefficient in phase change interface of icicle is built. Moving regulation of phase change interface of icicle is recorded by using industrial cameras through changing initial dimension of icicle, initial temperature in icicle, velocity and temperature of water. By analyzing the experimental results, some conclusions are as follow:the number of azimuths is different for each measurement point, as the melting process is carried out, the Nusselt number values of the measurement points increase first and then decrease, and there is a maximum value in the middle of the whole melting process. The convective heat transfer coefficient along the azimuth angle increases with the increase of the velocity or temperature of the water flow under the condition that the remaining experimental control parameters are unchanged. Empirical correlation of Nu_φ,Gr, Re, Pr, Ste and φ is obtained.

Key words: water flowing along icicle, phase change, convection, heat transfer

中图分类号:

TK02

孟凡康, 褚琦, 王锦力. 低Reynolds数条件下水流纵掠长冰柱沿方位角传热特性[J]. 化工学报, 2018, 69(6): 2424-2431.

MENG Fankang, CHU Qi, WANG Jinli. Heat transfer characteristics of water flowing along icicle at low Reynolds number[J]. CIESC Journal, 2018, 69(6): 2424-2431.

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低Reynolds数条件下水流纵掠长冰柱沿方位角传热特性

Heat transfer characteristics of water flowing along icicle at low Reynolds number

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