Thermohydraulic performance enhancement for flow through circular geometries using curved pins

IF 2.1 Q2 ENGINEERING, MULTIDISCIPLINARY Applications in engineering science Pub Date : 2025-06-01 Epub Date: 2025-03-20 DOI:10.1016/j.apples.2025.100215

Rohit Dilip Gurav , Prashant Wasudeo Deshmukh , Parag Chaware

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Abstract

Passive techniques for enhancing the thermal performance of existing systems show promise for various thermal applications. This study examines the use of curved pins with a rectangular cross-section mounted on the inner surface of a circular tube. These curved pins enhance the fluid's residence time by creating circulation, improving local and average heat transfer coefficients. The research investigates the average heat transfer and pressure drop in circular tubes equipped with curved pins under fully developed turbulent flow conditions. The Reynolds numbers at the inlet range from 10,000 to 50,000. The results reveal that the convective heat transfer coefficient on the inner tube surface can be up to 200% higher than that of a smooth tube. Additionally, the cost-effectiveness of this heat transfer enhancement method is assessed by considering the associated pressure drop using the thermohydraulic performance parameter (R3), which ranges from 0.75 to 1.40.

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使用弯曲销钉提高流经圆形几何形状的热水力性能

被动技术用于提高现有系统的热性能显示出各种热应用的前景。本研究考察了在圆形管的内表面上安装矩形截面的弯曲销的使用。这些弯曲的销钉通过创造循环，提高局部和平均传热系数来延长流体的停留时间。研究了在充分发展的湍流条件下，装有弯曲销的圆管内的平均换热和压降。进口处的雷诺数在10000到50000之间。结果表明，管内表面的对流换热系数比光滑管内高200%。此外，通过考虑使用热液性能参数（R3）的相关压降（范围从0.75到1.40）来评估这种强化传热方法的成本效益。

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