Numerical Simulation of Turbulent Fluid Flow and Heat Transfer in a Circular Tube with Twisted Tapes Inserts
[1]Wu Jinxing,Wang Chao,Wang Mingqiang,et al.Numerical Simulation of Turbulent Fluid Flow and Heat Transfer in a Circular Tube with Twisted Tapes Inserts[J].Journal of Zhengzhou University (Engineering Science),2017,38(03):10-14.[doi:10.13705/j.issn.1671-6833.2016.06.018]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
38
Number of periods:
2017 03
Page number:
10-14
Column:
Public date:
2017-05-28
- Title:
- Numerical Simulation of Turbulent Fluid Flow and Heat Transfer in a Circular Tube with Twisted Tapes Inserts
- Keywords:
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typical twisted tape; grid spiral twisted tape; 3-edge twisted tape; enhanced heat transfer; numerical simulation
- CLC:
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- Abstract:
- In order to improve the comprehensive performance of convection in tubes inserted with twisted tapes,in the developed 3-edge twisted tape,a simulation was carried out to examine the comprehensive characteristics of single phase convection in circular tubes inserted with twisted tapes,including typical twisted tape,grid spiral twisted tape and 3-edge twisted tape.With water as the working fluid,the behavior of fluid flow and heat transfer of these different types of twisted tapes with the same twist ratio y =2.0 were studied.The RNG k-ε turbulence model was chosen for the Reynolds number ranging from 5 000 to 30 000.The nusselt number(Nu),friction factor(f) and comprehensive performance evaluation factor(η) were calculated and compared with those of a plain tube in the same condition.The results showed that the comprehensive performance of 3-edge twisted tape was better than plain tube,the tubes with typical twisted tape and grid spiral twisted tapes insert.
- References:
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