Performance evaluation of turbulent circular heat exchanger with a novel flow deflector-type baffle plate

IF 2.2 4区工程技术 Q3 ENGINEERING, MULTIDISCIPLINARY Journal of Engineering Research Pub Date : 2024-12-01 DOI:10.1016/j.jer.2023.100105

Md Atiqur Rahman, Sushil Kumar Dhiman

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Abstract

Experiments were conducted to investigate the performance of an axial flow tubular heat exchanger with a novel swirl flow of air created by the addition of circular baffle plates featuring trapezoidal air deflectors with various inclination angles. The tubes remained in identical longitudinal arrangement and maintained constant heat flux over their surface. Each baffle plate contained four deflectors with an equal inclination angle, generating an air swirl inside the circular duct containing the heated tubes that improved the air-side turbulence and thus the rate of heat transfer from the tubes' surfaces. The pitch ratio of the baffle plates was varied, and the Reynolds number was kept in the range of 16000–28000. Results from the study showed an average 7.4% improvement in performance enhancement criteria when the exchanger was fitted with a baffle plate featuring a deflector inclination angle of 30° and operated under counter flow conditions when compared to a parallel flow arrangement operating under similar experimental conditions.

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新型折流板型紊流循环换热器的性能评价

通过实验研究了轴流管式换热器的性能，该换热器通过增加具有不同倾角的梯形导风板的圆形折流板来产生新型涡流气流。管子保持相同的纵向排列，并在其表面保持恒定的热通量。每个挡板包含四个倾角相等的偏转板，在装有加热管的圆形管道内产生空气涡流，从而改善空气侧的湍流，从而提高管道表面的热量传递率。改变折流板的螺距比，雷诺数保持在16000 ~ 28000之间。研究结果表明，在逆流条件下，与平行流动条件下相比，安装偏转板倾角为30°的折流板时，换热器的性能增强标准平均提高了7.4%。

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来源期刊

Journal of Engineering Research ENGINEERING, MULTIDISCIPLINARY-

CiteScore

1.60

自引率

10.00%

发文量

181

审稿时长

20 weeks

期刊介绍： Journal of Engineering Research (JER) is a international, peer reviewed journal which publishes full length original research papers, reviews, case studies related to all areas of Engineering such as: Civil, Mechanical, Industrial, Electrical, Computer, Chemical, Petroleum, Aerospace, Architectural, Biomedical, Coastal, Environmental, Marine & Ocean, Metallurgical & Materials, software, Surveying, Systems and Manufacturing Engineering. In particular, JER focuses on innovative approaches and methods that contribute to solving the environmental and manufacturing problems, which exist primarily in the Arabian Gulf region and the Middle East countries. Kuwait University used to publish the Journal "Kuwait Journal of Science and Engineering" (ISSN: 1024-8684), which included Science and Engineering articles since 1974. In 2011 the decision was taken to split KJSE into two independent Journals - "Journal of Engineering Research "(JER) and "Kuwait Journal of Science" (KJS).