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Journal of Flow Visualization and Image Processing

Publication de 4  numéros par an

ISSN Imprimer: 1065-3090

ISSN En ligne: 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

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INVESTIGATION OF LPG SOOTING DIFFUSION FLAME BY RAINBOW SCHLIEREN DEFLECTOMETRY

Volume 27, Numéro 3, 2020, pp. 297-318
DOI: 10.1615/JFlowVisImageProc.2020030930
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RÉSUMÉ

Rainbow schlieren deflectometry was employed to characterize the flame structure of unsteady laminar liquefied petroleum gas (LPG) jet diffusion flame. The schlieren images were acquired at 4000 Hz sampling rate for sooting LPG flame at Re = 500, and Abel inversion was employed to estimate local field refractive index difference. The a priori relationship between the refractive index difference and temperature was established using the opposed flow flame reactor concept. The peak temperature observed in the near-field region varies with axial location from 1000 K to 1700 K, which falls in the range of typical sooting flame. The sooting flame has depicted a typical flicker behavior of the unsteady laminar diffusion flame. Flicker behavior and flame puff formation could be attributed to the interaction of buoyancy-sustained outer vortical structure with the flame surface. It was observed that additional air entrainment during puff formation leads to higher temperatures in the puff (1700 K), which leads to better oxidation of carbon soot and its precursors at downstream locations, a unique feature of sooting flames. Irrespective of whether space-time evolution at any axial location or frequency spectrum analysis of temporal signal of hue at any spatial location or the amplitude-time signal of decomposed mode from proper orthogonal decomposition (POD) analysis of color schlieren images, is employed the global unique flicker frequency of 13.33 Hz was observed in the near-field LPG diffusion flame. Interestingly the first two dominant energy modes of POD analysis correspond to flow features indicating strong ambient air entrainment pointing towards the role of outer vortical structures on flame flickering phenomena.

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CITÉ PAR
  1. Mahesh Nayak G., Kolhe Pankaj, Balusamy Saravanan, Experimental study of buoyancy-induced instability in the DME and LPG jet diffusion flame, Fuel, 291, 2021. Crossref

  2. Nayak Guguloth Mahesh, Kolhe Pankaj, Balusamy Saravanan, Role of Buoyancy Induced Vortices in a Coupled-Mode of Oscillation in Laminar and Turbulent Jet Diffusion Flames, Flow, Turbulence and Combustion, 108, 4, 2022. Crossref

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