Numerical study of condensation heat and mass transfer characteristics of air-steam mixtures in novel grooved corrugated tube

IF 3.9 3区工程技术 Q3 ENERGY & FUELS

Chemical Engineering and Processing - Process Intensification Pub Date : 2025-07-25 DOI:10.1016/j.cep.2025.110465

Weigang Xu , Hanlin Zhang , Quan Yang , Shijian Zhang , Lin Liu , Ao Wang , Shi Bu

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Abstract

A Novel Grooved Corrugated Tube (NGCT) was proposed to enhance heat transfer by employing airflow to form tangential vortices in the drainage groove. Numerical simulations of steam condensation revealed the groove's impact on flow fields and liquid film distribution, establishing optimal parameters at groove height is 0.1 times the tube diameter and the angle is 24° Results demonstrate that within the inlet velocity range of 5 to 15 m·s⁻¹, the total heat transfer coefficient increases linearly with velocity, ranging from 85.46 % to 111.09 %. Similarly, increasing the inlet steam quality from 0.6 to 1 results in a linear increase in the overall heat transfer coefficient, ranging from 336.7 % to 440.6 %. The corrugated tube with a drainage groove structure effectively enhances the turbulence intensity of the internal steam, disrupts the non-condensable gas layer, and reduces the formation and accumulation of the liquid film, thereby significantly improving the overall heat transfer efficiency.

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新型槽状波纹管内空气-蒸汽混合物冷凝传热传质特性的数值研究

提出了一种新型槽状波纹管（NGCT），利用气流在排水槽内形成切向涡来加强换热。结果表明：在进口速度5 ~ 15 m·s⁻¹范围内，总换热系数随速度的增加呈线性增加，范围为85.46% ~ 111.09%；同样，将进口蒸汽质量从0.6增加到1，导致总体传热系数线性增加，范围从336.7%到440.6%。采用排水槽结构的波纹管有效地增强了内部蒸汽的湍流强度，破坏了不凝气层，减少了液膜的形成和积聚，从而显著提高了整体换热效率。

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来源期刊

Chemical Engineering and Processing - Process Intensification 工程技术-工程：化工

CiteScore

7.80

自引率

9.30%

发文量

408

审稿时长

49 days

期刊介绍： Chemical Engineering and Processing: Process Intensification is intended for practicing researchers in industry and academia, working in the field of Process Engineering and related to the subject of Process Intensification.Articles published in the Journal demonstrate how novel discoveries, developments and theories in the field of Process Engineering and in particular Process Intensification may be used for analysis and design of innovative equipment and processing methods with substantially improved sustainability, efficiency and environmental performance.