原子能科学技术2016，Vol.50Issue(8)：1395-1401,7.DOI:10.7538/yzk.2016.50.08.1395
超临界压力下竖直圆管内不同流体的传热特性
Heat Transfer Characteristics of Different Fluids in Vertical Tube under Supercritical Pressure
摘要
Abstract
To understand heat transfer mechanism from general character and make clear the difference caused by properties,experiments of heat transfer to water and Freon R134a flowing upward in vertical tubes were conducted on SWAMUP and SMOTH test facilities,respectively.The variations of heat transfer coefficients of water and Freon with dimensionless temperature are coincident in the case of normal heat transfer,heat transfer enhancement and heat transfer deterioration due to buoyancy force and accelera-tion effect.The HTC ratio decreases with the increase of dimensionless parameter πB . The HTC ratio increases first and then decreases with the increase of dimensionless parametersπA .The dimensionless parameters πB and πA show better relevance on the supercritical water and Freon experimental data,respectively.The investigation of the heat transfer behavior of supercritical water in the SCWRs by means of model fluid Freon R134a is proved reasonable and feasible because of the similarity dependence on dimensionless parameters.关键词
模化流体/超临界传热/换热系数/传热恶化/无量纲数Key words
model fluid/supercritical heat transfer/heat transfer coefficient/heat transfer deterioration/dimensionless number分类
能源科技引用本文复制引用
张思宇,陈佳跃,赵萌,熊珍琴,顾汉洋..超临界压力下竖直圆管内不同流体的传热特性[J].原子能科学技术,2016,50(8):1395-1401,7.基金项目
国家自然科学基金资助项目(51206106) （51206106）
