Numerical studies on the effect of baffle on the heat transfer and flow in cross-corrugated triangular ducts

被引：8

作者：

Liang, C. H. ^{[1
]}

Feng, C. N. ^{[1
]}

Lei, T. Y. ^{[1
]}

Li, Z. X. ^{[2
]}

机构：

[1] Guilin Univ Elect Technol, Sch Mech & Elect Engn, Guilin, Peoples R China

[2] Shanxi Univ, Dept Environm Engn, Taiyuan, Shanxi, Peoples R China

来源：

4TH ASIA CONFERENCE OF INTERNATIONAL BUILDING PERFORMANCE SIMULATION ASSOCIATION | 2019年 / 238卷

基金：

中国国家自然科学基金;

关键词：

OPTIMIZATION; DESIGN;

D O I：

10.1088/1755-1315/238/1/012086

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The cross-corrugated triangular ducts are suitable for plate heat exchanger because of its high heat transfer capability and strong mechanical strength. In this numerical study, a SST k-omega model is used, 6 different cases for installing different baffles in the cross -corrugated triangular ducts are involved. The frictional resistance and heat transfer coefficient in the 1000-6000 range of Reynolds number are studied, the influence of baffle on flow -pattern and temperature distribution are analyzed. Combined with the comprehensive heat transfer index, a good improvement plan was proposed. The results show that baffle can effectively increase the heat transfer area, change the mainstream direction, enhance the fluid disturbance, and enhance the heat transfer. In addition, case 6 is the best enhanced heat transfer scheme. Compared with the case without the baffle, the Nu of case 6 is 1.5-1.6 times that of the original duct, and the heat transfer efficiency can be increased by 13% under the same fan power. It is a feasible choice to set up baffles in the middle and lower part of the upstream channel of the cross-corrugated triangular plate flow channel.

引用

页数：8

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