Performance evaluation of the characteristics of flow and heat transfer in a tube equipped with twisted tapes of new configurations

被引：37
作者：
Fagr, Mohsen H. [1 ]
Rishak, Qais A. [2 ]
Mushatet, Khudheyer S. [1 ]
机构：
[1] Univ Thi Qar, Mech Engn Dept, Nasseriya, Iraq
[2] Univ Basra, Mech Engn Dept, Basra, Iraq
来源：
INTERNATIONAL JOURNAL OF THERMAL SCIENCES | 2020年 / 153卷
关键词：
Twisted tape; Tapered; Thermal performance; TRANSFER ENHANCEMENT; EXCHANGER; INSERTS;
D O I：
10.1016/j.ijthermalsci.2020.106323
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
An experimental and numerical study was done to discover the effect of insertion of twisted tapes of decreased tapered configurations inside a tube on thermal and hydrodynamic fields. Constant heat flux was supplied to the tube surface and the working fluid was the air which was flowed with turbulent flow of 10000 <= Re <= 40000. RNG k-epsilon turbulent model was used. The obtained results showed that there is no significant difference in thermal performance factor between some studied cases of inserting decreased tapered twisted tape and the case of inserting typical twisted tape. The obtained experimental data of Nusselt number, friction factor and thermal performance factor were described by Empirical correlations.
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页数：9
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