圆柱腔内石蜡熔化过程实验探究

王帅; 彭常宏; 郭赟

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

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圆柱腔内石蜡熔化过程实验探究

核能科学与工程 | 更新时间：2021-05-24

- 圆柱腔内石蜡熔化过程实验探究
- Experimental study on paraffin melting in a cylindrical cavity
- 核技术 2016年39卷第9期文章编号：090601
- 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：
  
  [ "王帅,男,1991年出生,2014年毕业于中国科学技术大学,现为硕士研究生,研究领域为反应堆热工安全分析", "WANG Shuai, male, born in 1991, graduated from University of Science and Technology of China in 2014, master student, focusing on reactor safety analysis" ]
  郭赟,E-mail:guoyun79@ustc.edu.cn GUO Yun, E-mail:guoyun79@ustc.edu.cn
- 基金信息：
  
  国家自然科学基金(No.11305169)
- DOI：10.11889/j.0253-3219.2016.hjs.39.090601
  中图分类号： TL364
- 收稿日期：2016-06-06，
  
  修回日期：2016-07-01，
  
  纸质出版日期：2016-09
- 稿件说明：
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王帅, 彭常宏, 郭赟. 圆柱腔内石蜡熔化过程实验探究[J]. 核技术, 2016,39(9):090601

Shuai WANG, Changhong PENG, Yun GUO. Experimental study on paraffin melting in a cylindrical cavity[J]. Nuclear techniques, 2016, 39(9): 090601
王帅, 彭常宏, 郭赟. 圆柱腔内石蜡熔化过程实验探究[J]. 核技术, 2016,39(9):090601 DOI： 10.11889/j.0253-3219.2016.hjs.39.090601.

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

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