Predicting critical heat flux in slug flow regime of uniformly heated vertical channel using coolant and geometric parameters

Vincent Yao Agbodemegbe, E. Akaho, A. Ayensu, E. Alhassan, C. Bansah, N. Adoo
{"title":"Predicting critical heat flux in slug flow regime of uniformly heated vertical channel using coolant and geometric parameters","authors":"Vincent Yao Agbodemegbe, E. Akaho, A. Ayensu, E. Alhassan, C. Bansah, N. Adoo","doi":"10.4314/JAST.V16I1-2.64775","DOIUrl":null,"url":null,"abstract":"Numerical computation code (PWR-DNBP) has been developed to predict Critical Heat Flux (CHF) of forced convective flow of water in a vertical heated channel. The code was based on the liquid sub-layer model, with the assumption that CHF occurred when the liquid film thickness between the heated surface and vapour in the slug flow regime attained critical film thickness of infinitesimally small value at positive liquid velocities for which the value of critical heat flux ratio (CHFR) ~ 1. The numerical simulations predicted trends that CHF decreased with increasing flow quality, increased with increasing coolant mass flux, and increased with channel diameter. The predicted CHF were validated with data obtained by Tong’s correlation, and the computational errors indicated deviations of 5 -10 % uncertainty levels.","PeriodicalId":9207,"journal":{"name":"British Journal of Applied Science and Technology","volume":"21 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2011-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"British Journal of Applied Science and Technology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.4314/JAST.V16I1-2.64775","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1

Abstract

Numerical computation code (PWR-DNBP) has been developed to predict Critical Heat Flux (CHF) of forced convective flow of water in a vertical heated channel. The code was based on the liquid sub-layer model, with the assumption that CHF occurred when the liquid film thickness between the heated surface and vapour in the slug flow regime attained critical film thickness of infinitesimally small value at positive liquid velocities for which the value of critical heat flux ratio (CHFR) ~ 1. The numerical simulations predicted trends that CHF decreased with increasing flow quality, increased with increasing coolant mass flux, and increased with channel diameter. The predicted CHF were validated with data obtained by Tong’s correlation, and the computational errors indicated deviations of 5 -10 % uncertainty levels.
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
利用冷却剂和几何参数预测均匀加热垂直通道段塞流态的临界热流密度
开发了数值计算程序PWR-DNBP,用于预测水在垂直加热通道中强制对流的临界热流密度。该程序基于液体亚层模型,假设在段塞流状态下,受热表面与蒸汽之间的液膜厚度在正液体速度下达到无限小的临界膜厚度,且临界热流密度比(CHFR)为1时发生CHF。数值模拟预测CHF随流动质量的增加而减小,随冷却剂质量通量的增加而增大,随通道直径的增大而增大。预测的CHF用Tong的相关性得到的数据进行了验证,计算误差表明偏差为5 - 10%的不确定性水平。
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 去求助
来源期刊
自引率
0.00%
发文量
0
期刊最新文献
Decision Support System of Determining E-Commerce With The Topsis and Comparation With Ahp for UMKM In the Tuban Regency Area Utilization of Virtual Reality Technology in Knowing the Symptoms of Acrophobia and Nyctophobia Implementation of Multiple Intelligences Determinant Applications for Junior High School Students Using Web-Based Likert Scale Method Design and Build a Water Pump Protection Tool Using IOT (Internet Of Things) Based Water Flow Sensor The Study Of The Application Of Noise Mapping Using Golden Surfer Software To Control Noise
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1