| The effect of gravity on R410A condensing flow in horizontal circular tubes | |
Li W; Zhang JZ; Mi PF; Zhao JF(赵建福) ; Tao Z; Childs PRN; Shih TIP; Li, W (reprint author), Zhejiang Univ, Dept Energy Engn, 38 Zheda Rd, Hangzhou 310027, Zhejiang, Peoples R China.
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| Source Publication | NUMERICAL HEAT TRANSFER PART A-APPLICATIONS
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| 2017 | |
| Volume | 71Issue:3Pages:327-340 |
| ISSN | 1040-7782 |
| Abstract | Heat transfer characteristics of R410A condensation in horizontal tubes with the inner diameter of 3.78 mm under normal and reduced gravity are investigated numerically. The results indicate that the heat transfer coefficients increase with increasing gravitational accelerations at a lower mass flux, whereas their differences under varying gravity are insignificant at a higher mass flux. The liquid film thickness decreases with increasing gravity at the top part of the tube, whereas the average liquid film thickness is nearly the same under different gravity accelerations at the same vapor quality and mass flux. The local heat transfer coefficients increase with increasing gravity at the top of the tube and decrease with increasing gravity at the bottom. The proportion of the thin liquid film region is important for the overall heat transfer coefficients for the condensing flow. A vortex with its core lying at the bottom of the tube is observed under normal gravity because of the combined effect of gravity and the mass sink at the liquid-vapor interface, whereas the stream traces point to the liquid-vapor interfaces under zero gravity. The mass transfer rate under zero gravity is much lower than that of normal gravity. |
| DOI | 10.1080/10407782.2016.1264743 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000396590600006 |
| WOS Keyword | CONDENSATION HEAT-TRANSFER ; FILM CONDENSATION ; CONVECTIVE CONDENSATION ; SURFACE-TENSION ; TRANSFER MODEL ; PRESSURE-DROP ; MICROFIN TUBE ; MICROGRAVITY ; MICROCHANNELS ; INCLINATION |
| WOS Research Area | Thermodynamics ; Mechanics |
| WOS Subject | Thermodynamics ; Mechanics |
| Funding Organization | National Science Foundation of Zhejiang Province, China [LZ13E060001] ; National Science Foundation of China [51210011] ; Zhejiang Provincial Public Projects (analysis and test) of Zhejiang Province [2015C37027] |
| Classification | 二类 |
| Ranking | 4 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/72134 |
| Collection | 微重力重点实验室 |
| Corresponding Author | Li, W (reprint author), Zhejiang Univ, Dept Energy Engn, 38 Zheda Rd, Hangzhou 310027, Zhejiang, Peoples R China. |
| Recommended Citation GB/T 7714 | Li W,Zhang JZ,Mi PF,et al. The effect of gravity on R410A condensing flow in horizontal circular tubes[J]. NUMERICAL HEAT TRANSFER PART A-APPLICATIONS,2017,71,3,:327-340. |
| APA | Li W.,Zhang JZ.,Mi PF.,赵建福.,Tao Z.,...&Li, W .(2017).The effect of gravity on R410A condensing flow in horizontal circular tubes.NUMERICAL HEAT TRANSFER PART A-APPLICATIONS,71(3),327-340. |
| MLA | Li W,et al."The effect of gravity on R410A condensing flow in horizontal circular tubes".NUMERICAL HEAT TRANSFER PART A-APPLICATIONS 71.3(2017):327-340. |
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| File Name/Size | DocType | Version | Access | License | ||
| Jp2017307.pdf（1802KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Download | |
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