Experimental study on boiling heat transfer characteristics and thermal-hydraulic thresholds in a vertical upward rectangular narrow channel

IF 6.2 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer Pub Date : 2026-03-01 Epub Date: 2026-01-22 DOI:10.1016/j.icheatmasstransfer.2026.110554

Chen Sun , Ren Dai , Leren Tao , Cheng Jin , Wanying Chang , Peiyu Liu , Zheming Cheng

{"title":"Experimental study on boiling heat transfer characteristics and thermal-hydraulic thresholds in a vertical upward rectangular narrow channel","authors":"Chen Sun , Ren Dai , Leren Tao , Cheng Jin , Wanying Chang , Peiyu Liu , Zheming Cheng","doi":"10.1016/j.icheatmasstransfer.2026.110554","DOIUrl":null,"url":null,"abstract":"<div><div>Two-phase flow boiling experiment has conducted in a visual vertically upward narrow rectangular channel featuring unilaterally electric heating. The geometric dimension of the channel is 686 mm × 216 mm × 2.75 mm (<em>l</em> × <em>w</em> × <em>s</em>), using deionized water as the working medium. The experiment was carried out under atmospheric pressure, covering the range in inlet temperature of 50–90 °C, mass flux of 4.04–24.24 kg/(m<sup>2</sup>·s), and heat flux of 6.41–48.08 kW/m<sup>2</sup>. A high-speed photography was used to classified the flow patterns and flow regimes in each stage and analyze the corresponding local and average heat transfer characteristics. The results indicate that a secondary enhancement in heat transfer during the transition from convective boiling (CB) to the film evaporation (FE) mechanism. The wall superheat at onset of film evaporation (ONB), onset of fully developed boiling (OFDB), and onset of film evaporation (OFE) exhibited a strong positive correlation with heat flux, while the influences of inlet temperature and mass flux were negligible. The average HTC in the narrow channel is dictated by the flow regime distribution. A comprehensive evaluation of numerous predictive models for thermal-hydraulic thresholds and heat transfer coefficients was conducted. New correlations for ONB, OFDB, OFE, and average HTC were developed and demonstrated excellent predictive accuracy, with mean relative errors (MRE) of −2.71%, −2.80%, 3.25%, and 0.19%, respectively.</div></div>","PeriodicalId":332,"journal":{"name":"International Communications in Heat and Mass Transfer","volume":"172 ","pages":"Article 110554"},"PeriodicalIF":6.2000,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"International Communications in Heat and Mass Transfer","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0735193326000758","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2026/1/22 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"MECHANICS","Score":null,"Total":0}

引用次数: 0

Abstract

Two-phase flow boiling experiment has conducted in a visual vertically upward narrow rectangular channel featuring unilaterally electric heating. The geometric dimension of the channel is 686 mm × 216 mm × 2.75 mm (l × w × s), using deionized water as the working medium. The experiment was carried out under atmospheric pressure, covering the range in inlet temperature of 50–90 °C, mass flux of 4.04–24.24 kg/(m²·s), and heat flux of 6.41–48.08 kW/m². A high-speed photography was used to classified the flow patterns and flow regimes in each stage and analyze the corresponding local and average heat transfer characteristics. The results indicate that a secondary enhancement in heat transfer during the transition from convective boiling (CB) to the film evaporation (FE) mechanism. The wall superheat at onset of film evaporation (ONB), onset of fully developed boiling (OFDB), and onset of film evaporation (OFE) exhibited a strong positive correlation with heat flux, while the influences of inlet temperature and mass flux were negligible. The average HTC in the narrow channel is dictated by the flow regime distribution. A comprehensive evaluation of numerous predictive models for thermal-hydraulic thresholds and heat transfer coefficients was conducted. New correlations for ONB, OFDB, OFE, and average HTC were developed and demonstrated excellent predictive accuracy, with mean relative errors (MRE) of −2.71%, −2.80%, 3.25%, and 0.19%, respectively.

查看原文本刊更多论文

垂直向上矩形窄通道沸腾换热特性及热水力阈值试验研究

在单向电加热的垂直向上的窄矩形通道内进行了两相流沸腾实验。通道几何尺寸为686 mm × 216 mm × 2.75 mm (l × w × s)，以去离子水为工质。实验在常压下进行，入口温度50 ~ 90℃，质量通量4.04 ~ 24.24 kg/(m2·s)，热流通量6.41 ~ 48.08 kW/m2。采用高速摄影技术对各阶段的流态和流型进行了分类，并分析了相应的局部和平均换热特性。结果表明，在从对流沸腾（CB）过渡到膜蒸发（FE）的过程中，传热发生了二次强化。膜蒸发起始壁面过热度（ONB）、完全沸腾起始时间（OFDB）和膜蒸发起始时间（OFE）与热流密度呈显著正相关，进口温度和质量流密度的影响可以忽略不计。窄通道中的平均HTC由流态分布决定。对众多的热液阈值和传热系数预测模型进行了综合评价。建立了ONB、OFDB、OFE和平均HTC的新相关性，并证明了良好的预测准确性，平均相对误差（MRE）分别为- 2.71%、- 2.80%、3.25%和0.19%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

International Communications in Heat and Mass Transfer 工程技术-力学

CiteScore

11.00

自引率

10.00%

发文量

648

审稿时长

32 days

期刊介绍： International Communications in Heat and Mass Transfer serves as a world forum for the rapid dissemination of new ideas, new measurement techniques, preliminary findings of ongoing investigations, discussions, and criticisms in the field of heat and mass transfer. Two types of manuscript will be considered for publication: communications (short reports of new work or discussions of work which has already been published) and summaries (abstracts of reports, theses or manuscripts which are too long for publication in full). Together with its companion publication, International Journal of Heat and Mass Transfer, with which it shares the same Board of Editors, this journal is read by research workers and engineers throughout the world.