[1]张艳勇,陈宝明*,李佳阳,等.基于孔隙尺度的多孔骨架对固液相变的影响[J].山东建筑大学学报,2019,34(06):56-62.[doi:10.12077/sdjz.2019.06.010]
 ZHANG Yanyong,CHEN Baoming*,LI Jiayang,et al.Study on the influence of porous skeleton on solid-liquid phase change based on pore size[J].Journal of Shandong jianzhu university,2019,34(06):56-62.[doi:10.12077/sdjz.2019.06.010]
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基于孔隙尺度的多孔骨架对固液相变的影响()
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《山东建筑大学学报》[ISSN:1673-7644/CN:37-1449/TU]

卷:
34
期数:
2019年06期
页码:
56-62
栏目:
研究论文
出版日期:
2019-12-01

文章信息/Info

Title:
Study on the influence of porous skeleton on solid-liquid phase change based on pore size
文章编号:
1673-7644(2019)06-0056-07
作者:
张艳勇陈宝明*李佳阳张自仕
(山东建筑大学 热能工程学院,山东 济南 250101)
Author(s):
ZHANG Yanyong CHEN Baoming* LI Jiayang et al.
(School of Thermal Engineering, Shandong Jianzhu University, Jinan 250101, China)
关键词:
多孔介质骨架固液相变格子玻尔兹曼方法两区域模型
Keywords:
porous skeleton solid-liquid phase transition lattice Boltamann method two-zone model
分类号:
TU996
DOI:
10.12077/sdjz.2019.06.010
文献标志码:
A
摘要:
相变储能材料中加入多孔介质骨架,可以有效地改善相变材料导热系数,增强其结构稳定性,防止相变材料泄漏,促进相变材料在电池热管理、太阳能发电等众多领域的应用。文章采用四参数法生成随机多孔介质骨架,并导入到固液相变两区域模型中,基于格子玻尔兹曼方法,从孔隙尺度分析了无量纲瑞利数(Ra数)、普朗特数(Pr数)、斯蒂芬数(Ste数)对方腔内填充多孔介质骨架固液相变融化传热的变化规律。结果表明:在相变期间传热方式由导热为主向自然对流传热改变,糊状区逐渐发生弯曲;Ra数越大自然对流越强,在达到准稳态阶段时融化率和热壁面平均Nu数都越大;Ste数越小,热壁面平均Nu数越大,相变材料融化速率越慢;在低Pr数(Pr<0.1)下,随着Pr数的增加,相变材料的融化速度逐渐增加,但Pr数增加到一定程度(Pr=0.1),继续增加Pr数,当达到准稳态阶段时,相变材料融化率不再发生变化。
Abstract:
The phase change energy storage material is filled with a porous medium skeleton, which has many advantages in improving the thermal conductivity of the phase change material, enhancing its structural stability, and preventing phase change material leakage. Quartet Structure Generation Set (QSGS) was used to generate random skeleton of porous media, which was introduced into the two-zone model of solid-liquid phase transition. Based on the lattice Boltzmann method (LBM), the heat transfer of solid-liquid phase transition of porous media skeleton filled with square cavity was analyzed from the pore scale by dimensionless parameters Ra number, Pr number and Ste number. The results show that the mushy zone gradually bends due to the change of heat transfer mode from heat conduction to natural convection during the phase transition period; the stronger the Ra number is, the higher the melting rate and the average Nu number of thermal wall are at the quasi-steady state stage; the smaller the Ste number is, the larger the average Nu number of thermal wall is, and the melting rate of phase change materials is. The slower the melting rate is, the faster the melting rate of phase change materials increases with the increase of Pr number at low Pr number (Pr < 0.1), but when Pr number increases to a certain extent (Pr = 0.1), the melting rate of phase change materials will not change when the quasi-steady state phase is reached.

参考文献/References:

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相似文献/References:

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备注/Memo

备注/Memo:
收稿日期:2019-10-12 基金项目:国家自然科学基金面上项目(51976111) 作者简介:张艳勇(1991-),男,在读硕士,主要从事多孔介质内流动换热等方面的研究.E-mail: 15064158626@163.com 通讯作者*:陈宝明(1963-),男,教授,博士,主要从事复杂体系中的传热、传质等方面的研究.E-mail: chenbm@sdjzu.edu.cn
更新日期/Last Update: 2019-10-21