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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

THE IDENTIFICATION OF AN UNSTABLE WAKE VORTEX

Volumen 16, Edición 2, 2009, pp. 103-125
DOI: 10.1615/JFlowVisImageProc.v16.i2.10
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SINOPSIS

This article describes a research study that examines the potential of exciting instability modes in a trailing vortex wake to cause the premature breakup and decay of these hazardous wake structures. A four-vortex wake model has been selected for this study as it is representative of a landing aircraft wake; a flight stage that is most prone to wake encounters. Previous work done by the authors has resulted in the identification of a region of counter-rotating wake configurations that are conducive to large temporal instability growth rates. This region is also observed to include those configurations which are known to translate rigidly. The driving hypothesis of the current work is that the observed unstable motion is a long-wavelength instability that is driven by the mutual interaction of the tip/flap vortex pair on each side of the wake centerline. Direct injection of helium bubbles and olive oil particles have been used as effective tools for the identification of the long-wavelength instability. The data attained from visual images of the wake have been used to obtain quantitative estimates of the discernable physical features of the long-wavelength bending mode, including the wavelength and amplitude, for comparison with linear stability theory.

CITADO POR
  1. Babie Brian M., Nelson Robert C., An experimental investigation of bending wave instability modes in a generic four-vortex wake, Physics of Fluids, 22, 7, 2010. Crossref

  2. Liu Zhi Rong, Wang Jun Wei, Zhu Rui, Fluid Experimental Research on Dual-Vortex Interaction Instability, Advanced Materials Research, 459, 2012. Crossref

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