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Journal of Enhanced Heat Transfer
Главный редактор: Zhixiong Guo (open in a new tab)
Founding Advisory Editor: Arthur E. Bergles (open in a new tab)
Редактор-основатель: Ralph L. Webb (open in a new tab)

Выходит 8 номеров в год

ISSN Печать: 1065-5131

ISSN Онлайн: 1563-5074

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

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Augmented Heat Transfer in Square Channels with Wedge-Shaped and Delta-Shaped Turbulence Promoters

Том 1, Выпуск 1, 1994, pp. 37-52
DOI: 10.1615/JEnhHeatTransf.v1.i1.40
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Je-Chin Han
Turbine Heat Transfer Laboratory, Department of Mechanical Engineering, Texas A&M University College Sation, TX 77843-3123, USA
J. Joy Huang
Department of Mechanical Engineering, Texas A & M University, College Station, Texas 77843-3123
Ching-Pang Lee
General Electric Company, Cincinnati, Ohio 45215, U.S.A.

Краткое описание

The effect of rib configuration on local heat transfer coefficients and pressure drop in a square channel with two opposite in-line ribbed walls was investigated at Reynolds numbers from 15,000 to 80,000. Two types of rib configurations were studied. The first group is a wedge-shaped rib with the rib height-to-hydraulic diameter ratio of 0.125 and the rib pitch-to-height ratio of 5 or 10. Both full length and broken ribs are studied. The second group is a delta-shaped rib with the rib height-to-hydraulic diameter ratio of 0.125 and the rib pitch-to-height ratio of 5. Both aligned and offset arrangements are studied for a forward and backward direction relative to the mainstream flow. Results show that, for the delta-shaped rib, the backward flow direction has higher heat transfer than the forward flow direction, and the aligned arrangement is better than the offset arrangement. The broken configuration for the wedge-shaped rib performs better than the full length one. In general, the delta-shaped rib performs better than the wedge-shaped rib. The backward delta-shaped aligned rib configuration produces the highest heat transfer augmentation (3-4 times), while the backward delta-shaped offset rib creates the smallest pressure drop penalty (5-6 times). Results also show that the surface heat flux ratio has significant effect on the smooth-side heat transfer augmentation, while the effect on the ribbed-side is relatively small.

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