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Journal of Flow Visualization and Image Processing

Publicado 4 números por año

ISSN Imprimir: 1065-3090

ISSN En Línea: 1940-4336

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: 0.6 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: 0.6 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: 0.00013 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: 0.14 SJR: 0.201 SNIP: 0.313 CiteScore™:: 1.2 H-Index: 13

Indexed in

ON THE COOLING OF GAS TURBINES

Volumen 8, Edición 2-3, 2001, 6 pages
DOI: 10.1615/JFlowVisImageProc.v8.i2-3.160
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SINOPSIS

This article deals with measurements of convective heat transfer coefficients in three fluid flow patterns that concern both internal and external cooling of gas turbine components; in particular, the flow in a couple of smooth, or ribbed, ducts connected by a 180° sharp turn, a jet in cross-flow, and a jet impinging on a wall for short nozzle-to-wall distances. An infrared (IR) scanning radiometer, associated with the heated-thin-foil technique, is used to perform the experimental measurements. In the latter case, particle image velocimetry (PIV) is also used to characterize the velocity field. Channels with 60° ribs show spanwise asymmetry of heat transfer maps because of secondary flows. For both tested rib pitches, the increase of turbulence due to the bend induces higher values of the Nusselt number in the outlet duct but the increase is lower than that relative to the smooth channel. For the jet in cross-flow, the normalized Nusselt number has values equal to unity outside the jet wake. Immediately downstream of the injection, a low heat transfer zone is present; afterward, the Nusselt number increases and attains a maximum value, which first increases and then decreases for increasing injection ratio. For a jet impinging on a wall at short distances, the radial Nusselt number profile shows a minimum at the stagnation point, two maxima, and a minimum between them. As the impingement distance increases, minima and external maxima .rst become much milder and then disappear while internal maxima coalesce in the stagnation point. Results seems to agree with PIV measurements.

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