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The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 2.3 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 1.8 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.2 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00037 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.6 SJR: 0.433 SNIP: 0.593 CiteScore™:: 4.3 H-Index: 35

Indexed in

Numerical Analyses of Effects of Tube Shape on Performance of a Finned Tube Heat Exchanger

卷 11, 册 1, 2004, pp. 61-74
DOI: 10.1615/JEnhHeatTransf.v11.i1.50
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摘要

This article discusses the effects of tube geometry on the performance of a multi-row finned tube heat exchanger having herringbone wavy fins. The air-side heat transfer and pressure drop characteristics of the heat exchanger were predicted numerically and the tube-side heat transfer coefficient and pressure drop were calculated using commonly adopted equations for turbulent flow in a smooth tube. The numerical calculations were performed in three dimensions for three frontal air velocities of 1.0, 2.0, and 3.0 m/s, yielding hydraulic diameter Reynolds numbers from 297 to 999. Investigated were five tube geometries, including a round tube, three elliptical oval tubes, and a flat oval tube. The round tube has a 15.875 mm (5/8") outside diameter and serves as the baseline tube. The four oval tubes were made by reforming the baseline round tube and have the same perimeter as that of the round tube. The aspect ratios of the three elliptical tubes are 2.00, 3.00, and 4.29, respectively, and the aspect ratio of the flat oval tube is 3.00. As the tube aspect ratio is increased, the air-side heat transfer coefficient and pressure drop decrease, but the water-side heat transfer coefficient and pressure drop increase. At 2.0 m/s frontal velocity, the 3.00 aspect ratio elliptical tube yields a 6.9% lower air-side heat transfer coefficient and a 45.9% lower air pressure drop than the round tube. As compared to the 3.00 aspect ratio elliptical tube, the same aspect ratio flat tube has a 0.6% higher air-side heat transfer coefficient and a 2.5% higher air pressure drop.

对本文的引用
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  18. KIM Nae-Hyun, Effects of fin corrugation and tube geometry on the airside performance of fin-and-tube heat exchangers - Part I; dry surface, Journal of Thermal Science and Technology, 16, 2, 2021. Crossref

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