Experimental study on paraffin melting in a cylindrical cavity

Shuai WANG; Changhong PENG; Yun GUO

doi:10.11889/j.0253-3219.2016.hjs.39.090601

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Experimental study on paraffin melting in a cylindrical cavity

NUCLEAR ENERGY SCIENCE AND ENGINEERING | 更新时间：2021-05-24

- Experimental study on paraffin melting in a cylindrical cavity
- NUCLEAR TECHNIQUES Vol. 39, Issue 9, Article number: 090601(2016)
- 作者机构：
  
  中国科学技术大学核科学技术学院合肥 230027
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China
- DOI：10.11889/j.0253-3219.2016.hjs.39.090601
  CLC： TL364
- Received：06 June 2016，
  
  Revised：01 July 2016，
  
  Published：2016-09
- 稿件说明：
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Shuai WANG, Changhong PENG, Yun GUO. Experimental study on paraffin melting in a cylindrical cavity[J]. Nuclear techniques, 2016, 39(9): 090601
DOI：

Shuai WANG, Changhong PENG, Yun GUO. Experimental study on paraffin melting in a cylindrical cavity[J]. Nuclear techniques, 2016, 39(9): 090601 DOI： 10.11889/j.0253-3219.2016.hjs.39.090601.

摘要

采用实验方法对圆柱空腔内相变材料（石蜡）的熔化过程进行研究，石蜡通过放置在中央位置的加热棒进行定功率加热。通过改变加热功率、水浴温度以及外壁的边界条件，记录石蜡相变过程中不同位置的温度变化情况，对比不同条件对熔化进程的影响。相变界面和熔化份额采用温度的三次插值和位置加权处理获得。熔化起始阶段，受到纯导热的影响，靠近加热棒的石蜡开始熔化，随之的自然对流的产生和加剧加快上部区域固体石蜡的熔化，最终在整个液体区域形成明显的温度分层。实验结果表明，提高斯蒂芬数

Ste

或者降低过冷度

对熔化进程有显著的促进作用。

Abstract

Background

Melting process is very complex in serious accident of reactor.However

because of the complex structure and materials

it is too hard to investigate the phenomenon directly.

Purpose

This paper aimed at clarifying the factors affecting the melting process.

Methods

A simple melting process of phase change materials(paraffin)inside a cylindrical container is presented experimentally in this study.Under different boundary conditions of the cylindrical outside surface

paraffin was heated to melt by the heating rod placed in the center of the cylindrical container.

Results

Phase front and liquid fraction during the melting process are obtained by interpolation method.

Conclusion

Due to heat conduction in early stage

paraffin near heating rod begins to melt

and then the generation and intensification of natural convection accelerate phase change in the upper region of the cylinder

causing significant temperature stratification in the upper region.Moreover

temperatures flat phenomena at some positions are described and discussed in detail.Besides

the effect of different heating power and boundary conditions on melting rate is compared

as well as the temperature of water bath.

关键词

Keywords

references

Q Wu , S Kim , M Ishii , . High pressure simulation experiment on corium dispersion in direct containment heating . Nuclear Engineering and Design , 1996 . 164 ( 1-3 ): 257 - 269 . DOI: 10.1016/0029-5493(96)01222-8 http://doi.org/10.1016/0029-5493(96)01222-8 .

L J Ott , S Hagen . Interpretation of the results of the CORA-33 dry core boiling water reactor test . Nuclear Engineering and Design , 1997 . 167 ( 3 ): 287 - 306 . DOI: 10.1016/S0029-5493(96)01305-2 http://doi.org/10.1016/S0029-5493(96)01305-2 .

张小英 , 姚婷婷 , 李志威 , . 堆芯熔融物对压力容器壁面烧蚀过程的数值模拟 . 核技术 , 2015 . 38 ( 2 ): 020606 DOI: 10.11889/j.0253-3219.2015.hjs.38.020606 http://doi.org/10.11889/j.0253-3219.2015.hjs.38.020606 .

Xiaoying ZHANG , Tingting YAO , Zhiwei LI , . Numerical simulation of the ablation process of the nuclear pressure vessel heated by core melt . Nuclear Techniques , 2015 . 38 ( 2 ): 020606 DOI: 10.11889/j.0253-3219.2015.hjs.38.020606 http://doi.org/10.11889/j.0253-3219.2015.hjs.38.020606 .

E M Sparrow , J A Broadbent . Inward melting in a vertical tube which allows free expansion of the phase-change medium . Journal of Heat Transfer , 1982 . 104 ( 2 ): 309 - 315 . DOI: 10.1115/1.3245089 http://doi.org/10.1115/1.3245089 .

W Z Chen , S M Chen , Z Liu , . Study of contact melting inside isothermally heated vertical cylindrical capsules . Journal of Thermal Science , 1993 . 2 ( 3 ): 190 - 195 . DOI: 10.1007/BF02650856 http://doi.org/10.1007/BF02650856 .

B J Jones , D Sun , S Krishnan , . Experimental and numerical study of melting in a cylinder . International Journal of Heat and Mass Transfer , 2006 . 49 ( 15-16 ): 2724 - 2738 . DOI: 10.1016/j.ijheatmasstransfer.2006.01.006 http://doi.org/10.1016/j.ijheatmasstransfer.2006.01.006 .

H Shmueli , G Ziskind , R Letan , . Melting in a vertical cylindrical tube:numerical investigation and comparison with experiments . International Journal of Heat and Mass Transfer , 2010 . 53 ( 19 ): 4082 - 4091 . DOI: 10.1016/j.ijheatmasstransfer.2010.05.028 http://doi.org/10.1016/j.ijheatmasstransfer.2010.05.028 .

郭英利.石蜡圆管外相变蓄热与释热规律的研究[D].天津:天津大学, 2008 http://cdmd.cnki.com.cn/article/cdmd-10056-2009071544.htm

GUO Yingli.Study on the heat storage and heat release by paraffin phase change outside the pipe[D].Tianjin:University of Tianjin, 2008

S M Wang , A Faghri , T L Bergman . Melting in cylindrical enclosures:numerical modeling and heat transfer correlations . Numerical Heat Transfer Part A:Applications An International Journal of Computation & Methodology , 2012 . 61 ( 11 ): 837 - 859 . DOI: 10.1080/10407782.2012.672895 http://doi.org/10.1080/10407782.2012.672895 .

L Kumar , B S Manjunath , R J Patel , . Experimental investigations on melting of lead in a cuboid with constant heat flux boundary condition using thermal neutron radiography . International Journal of Thermal Sciences , 2012 . 61 15 - 27 . DOI: 10.1016/j.ijthermalsci.2012.06.014 http://doi.org/10.1016/j.ijthermalsci.2012.06.014 .

Y Zhang , Z Chen , Q Wang , . Melting in an enclosure with discrete heating at a constant rate . Experimental Thermal and Fluid Science , 1993 . 6 ( 2 ): 196 - 201 . DOI: 10.1016/0894-1777(93)90029-I http://doi.org/10.1016/0894-1777(93)90029-I .

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