圆形管中填充带圆钉的螺旋状金属带时的传热和流动阻力研究(英文)
100 积分
50
评分
4.6 积分- 详情
- 2021-04-28
- 简介
pdf
- 1.0MB
- 页数 5P
- 阅读 64
- 下载 20
This paper deals with the experimental investigation on Nusselt number,friction factor and thermal en-hancement factor of a double pipe heat exchanger equipped with twisted tape consisting wire nails(WN-TT) and plain twisted tapes(P-TT) with three different twist ratios of y 2.0,4.4 and 6.0. Test runs are conducted using the water as the working fluid with Reynolds number range between 2000 and 12000 for WN-TT and P-TT. It is found that Nusselt number,friction factor and thermal enhancement factor in the tube equipped with WN-TT appreciably higher than those in the tube fitted with P-TT and plain tube. Over the range considered Nusselt number,friction factor and thermal enhancement factor in a tube with WN-TT are respectively,1.08 to 1.31,1.1 to 1.75 and 1.05 to 1.13 times of those in tube with P-TT. The better performance of WN-TT is due to combined effects of the follow-ing factors:(1) common swirling flow generated by P-TT,(2) additional turbulence offered by the wire nails. Em-pirical correlations for Nusselt number,friction factor and thermal enhancement factor are also formulated from the experimental results of WN-TT and P-TT.
对不起，您暂无在线预览权限，如需浏览请
立即登录热门商品
w5961***
擅长:
土建 给排水 暖通
- -
服务
- 4
商品
- -
人气
相关推荐
圆形管中填充带圆钉的螺旋状金属带时的传热和流动阻力研究(英文) 1.0MB
矩形截面螺旋通道内弹状流的流动特性 3.3MB
螺旋管内超临界航空煤油流动阻力特性 399KB
SH波入射时半圆形凸起地形附近浅埋圆形衬砌结构的动应力分析 865KB
管道气体流动阻力计算 12.9MB
在全压强范围内圆形管道的流导计算 394KB
内螺纹管内超临界水的流动阻力特性试验研究 497KB
植物木质部导管梯状穿孔板流动阻力特性研究 337KB
百叶窗翅片的传热和阻力性能试验研究 377KB