过热液体R134a中活塞效应的数值模拟

doi:10.7523/j.issn.2095-6134.2018.04.004

中国科学院大学学报 ›› 2018, Vol. 35 ›› Issue (4): 451-456.DOI: 10.7523/j.issn.2095-6134.2018.04.004

过热液体R134a中活塞效应的数值模拟

黄彩凤^1,2, 李玉华², 李志刚², 郭朝红², 姜玉雁^1,2

1. 中国科学院大学, 北京 100049;
2. 中国科学院工程热物理研究所, 北京 100190

收稿日期:2017-02-10 修回日期:2017-04-26 发布日期:2018-07-15
通讯作者: 李玉华
基金资助:
国家自然科学基金（51306186）资助

Numerical simulation of the piston effect in superheated liquid R134a

HUANG Caifeng^1,2, LI Yuhua², LI Zhigang², GUO Chaohong², JIANG Yuyan^1,2

1. University of Chinese Academy of Sciences, Beijing 100049, China;
2. Institute of Engineering Thermal Physics, Chinese Academy of Sciences, Beijing 100190, China

Received:2017-02-10 Revised:2017-04-26 Published:2018-07-15

摘要/Abstract

摘要： 针对一维密闭腔体中过热液体R134a的传热过程建立数学模型，并进行数值模拟研究。对计算区域左边界进行阶跃温差为1 K的等温加热，通过求解可压缩流体控制方程组，成功捕捉到流体内部存在的活塞效应，计算出其当量热导率，并分析过热程度对活塞效应的影响规律。结果表明：过热液体R134a中活塞效应当量热导率显著高于工质自身热导率，利用活塞效应可传递更高的热流密度，并实现更高的传热速率。

关键词: 过热液体, R134a, 活塞效应, 数值模拟

Abstract: In this paper, a model of one-dimensional cavity filled with meta-stable superheated liquid R134a is built to investigate influence of the piston effect (PE). Numerical simulation method is used in boundary condition of a temperature jump. The PE is caught in the superheated liquid by solving energy transport equation of compressible fluid. Then the equivalent thermal conductivity of PE is calculated. Furthermore, the influence of liquid superheat degree on piston effect is investigated. The higher the superheat degree is, the stronger the PE effect is. In conclusion, the piston effect is capable of carrying higher heat flux and speeding up thermal equilibrium in superheated liquid of R134a. The equivalent thermal conductivity of PE is obviously superior to pure heat conduction, and the equivalent thermal conductivity of PE is tripled.

Key words: superheated liquid, R134a, piston effect, numerical simulation

中图分类号:

TK121

黄彩凤, 李玉华, 李志刚, 郭朝红, 姜玉雁. 过热液体R134a中活塞效应的数值模拟[J]. 中国科学院大学学报, 2018, 35(4): 451-456.

HUANG Caifeng, LI Yuhua, LI Zhigang, GUO Chaohong, JIANG Yuyan. Numerical simulation of the piston effect in superheated liquid R134a[J]. , 2018, 35(4): 451-456.

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过热液体R134a中活塞效应的数值模拟

Numerical simulation of the piston effect in superheated liquid R134a

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