Influence of Phi (Φ) Shaped in Circular Ring Inserts on Thermal Performance in Circular Tube Heat Exchanger: CFD Study

Journal of Graphic Era University Pub Date : 2023-03-07 DOI:10.13052/jgeu0975-1416.1117

Gaurav Kandpal, Satyendra Singh, S. Bisht, H. Kharkwal

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Abstract

Enhancement of heat exchangers with the usage of inserts which creates turbulence in fluid flow by enhancing heat transfer rate which is an appealing area for researchers to develop efficient and compact heat exchanger with low expenses. Present work deals with computational investigation on circular tube with ϕ� shaped circular ring inserts taken as enhancer for better experience in heat transfer. The geometric dimensions of insert are 68 mm outer diameter with inner ring is half of outer diameter concentric ring having varying DR of 0.8, 0.85 and 0.9 with varying PR 3, 4 & 5 in which hydraulic diameter is 68.1 mm. The length of test section is 1500 mm with 1000 W/m22 of regular heat flux is applied and Re ranges from 3000 to 21000. CFD analysis conducted, compared & results are presented where maximum augmentation of heat transfer could be obtained 5.02–11.21 times simultaneously TPF is 2.14–3.54 times as compared to smooth tube for inserts with DR 0.8 and PR 3 which attained maximum S˙S˙ 3.07–5.1. Keywords: Heat exchanger, thermal performance factor, CFD analysis. Nomenclature

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圆形环形插片中Φ (Φ)对圆管换热器热性能的影响:CFD研究

利用插片在流体流动中产生紊流，从而提高换热速率，这是研究人员开发低成本高效紧凑换热器的一个有吸引力的领域。本文研究了以φ φ形环插片为增强剂的圆管传热的计算方法。内嵌件的几何尺寸为外径68 mm，内环为外径的一半，内径DR分别为0.8、0.85和0.9，内径PR分别为3,4和5，其中液压直径为68.1 mm。试验截面长度为1500mm，常规热流密度为1000w /m22, Re范围为3000 ~ 21000。进行了CFD分析，比较并给出了结果，与光滑管相比，DR为0.8和PR为3的插片最大S˙S˙3.07-5.1时，TPF为2.14-3.54倍，同时最大传热增强为5.02-11.21倍。关键词:换热器，热工性能因子，CFD分析命名法

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Journal of Graphic Era University

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