中国电机工程学报2011，Vol.31Issue(29)：91-96,6.
矩形通道内混合对流入口段阻力特性的实验研究
Experimental Investigation on the Flow Resistance Characteristic of the Entrance Region of Mixed Convection in Rectangular Channel
摘要
Abstract
The flow resistance characteristic of the entrance region of mixed convection in rectangular channel was studied by the experiment of the air flowed through a rectangular duct with a uniformly heated plate in the middle section. The rules of the friction factors variation connected with the Reynolds number, the Grashof numbers and inclination angles were obtained. The results reveal that when Re is less than 1 500, the friction factor increases with Re and decreases with Gr＊. Moreover, when the Re is greater than 1 500, the friction factor is little affected by Re and Gr＊. Furthermore, the friction factor increases with inclination angles. Considering the influences of Re, Gr＊, inclination angle and length to diameter ratio, correlations of friction factors were fitted when Re was greater or less than 1 500. Comparison of the friction factors calculated from the fitted correlations and the experimental results satisfactory reached agreement, with the deviations being less than 10%.关键词
矩形通道/混合对流/倾斜角度/阻力系数/关联式Key words
rectangular inclination angle/friction factors/duct/mixed convection/correlation分类
能源科技引用本文复制引用
张颖莉,种道彤,刘继平,胡党辉..矩形通道内混合对流入口段阻力特性的实验研究[J].中国电机工程学报,2011,31(29):91-96,6.基金项目
国家重点基础研究发展计划项目（973项目)（2009CB219803) （）
新世纪优秀人才支持计划项目（NCET-08-0441). （）
