化工学报2012，Vol.63Issue(10)：3080-3085,6.DOI:10.3969/j.issn.0438-1157.2012.10.011
含内热源多孔介质通道内ONB特性
ONB characteristics in porous media with internal heat source
摘要
Abstract
The onset of nucleate boiling (ONB) in the porous media with internal heat source was experimentally investigated. This paper adopted electromagnetic induction heating method to heat the pebble bed stacked with 8mm diameter steel balls. The inflexion of wall temperature was used to determine ONB. The influence factors of ONB were analyzed at the superficial velocity ranging from 0. 025 m · s-1 to 0. 050 m · s-1 , heat flux ranging from 7. 5 kW · m-2 to 52 kW · m-2. The temperature of wall had an inflexion clearly because of enhancement of heat transfer. The superheat of wall and heat flux required at ONB were smaller when the location was closer to the exit because temperature gradient decreased in the boundary layer. The superheat of wall and heat flux required at ONB were higher when velocity was higher because heat transfer was enhanced.关键词
内热源/多孔介质/ONBKey words
internal heat source/ porous media/ ONB分类
能源科技引用本文复制引用
徐广展,孙中宁,孟现珂,张小宁..含内热源多孔介质通道内ONB特性[J].化工学报,2012,63(10):3080-3085,6.基金项目
国家自然科学基金项目(11075042). （11075042）
