Analysis on compound heat transfer enhancement performance in outward convex corrugated tube with twisted insert

HAN Huaizhi; SONG Fuyuan; ZHANG Guolei; YANG Longbin; LI Yanjun

doi:10.11949/j.issn.0438-1157.20160575

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Analysis on compound heat transfer enhancement performance in outward convex corrugated tube with twisted insert

更新时间：2025-12-10

- Analysis on compound heat transfer enhancement performance in outward convex corrugated tube with twisted insert
- CIESC Journal Issue S1, Pages: 195-202(2016)
- 作者机构：
  
  哈尔滨工程大学动力与能源工程学院,黑龙江,哈尔滨,150001
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20160575
  CLC： Q028.8
- Online First：31 August 2016，
  
  Published：31 August 2016
- 稿件说明：
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HAN Huaizhi, SONG Fuyuan, ZHANG Guolei, et al. Analysis on compound heat transfer enhancement performance in outward convex corrugated tube with twisted insert[J]. CIESC Journal, 2016, (S1): 195-202.
DOI：

HAN Huaizhi, SONG Fuyuan, ZHANG Guolei, et al. Analysis on compound heat transfer enhancement performance in outward convex corrugated tube with twisted insert[J]. CIESC Journal, 2016, (S1): 195-202. DOI： 10.11949/j.issn.0438-1157.20160575.

摘要

针对一种新型的外凸式波节管结合内插扭带（CT）的流动与传热特性进行了RNGk-ε数值模拟研究。数值结果与实验结果进行了对比，验证了数值模型的精确性。将CT和传统的光管结合内插扭带（ST）的流动与传热特性进行了对比研究，揭示了其复合强化换热机理。结果表明CT相比于传统的ST，传热性能以及综合传热性能最多分别提高1.48和1.3倍，并且在低Reynolds数时提高得更加明显。CT在波节与扭带的间隙区域形成了脱体涡旋，破坏了近壁面的热边界层，同时扭带增加了主流区的扰动，使得湍动能增加，因此波节和扭带的协同作用使管内达到了复合强化换热效果。

Abstract

The flow and heat transfer characteristic in outward convex corrugated tube combined with insert twisted tube (CT) was numerically studied based on the three-dimension RNG k-ε model. A comparison is proposed between the numerical results and experimental results in order to check the reliability of numerical model. Comparative study on flow and heat transfer between the CT and conventional smooth tube (ST) is performed in order to review the compound heat transfer enhancement mechanism. The results show that compared with ST

the heat transfer performance and overall heat transfer performance of CT increase by 1.48 and 1.3 respectively

and more obvious in the low Reynolds number. Detached vortex is formed between the corrugatoion and twisted tape in CT

breaking the thermal boundary layer. Disturbance is increased by twisted tape in the main flow region

meanwhile

turbulence kinetic energy increase. Therefore

compound heat transfer enhancement is achieved by synergistic effect between the corrugation and twisted tape.

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