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雾化与喷雾

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ISSN 打印: 1044-5110

ISSN 在线: 1936-2684

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: 1.2 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: 0.3 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: 0.00095 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: 0.28 SJR: 0.341 SNIP: 0.536 CiteScore™:: 1.9 H-Index: 57

Indexed in

SPATIALLY AND TEMPORALLY RESOLVED DISTRIBUTIONS OF LIQUID IN AN EFFERVESCENT SPRAY

卷 22, 册 7, 2012, pp. 603-626
DOI: 10.1615/AtomizSpr.2012006055
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摘要

We employed planar laser-induced fluorescence (LIF) in combination with stereoscopic particle image velocimetry for imaging of concentration and flux fields of liquid phase in an effervescent spray. Light heating oil (LHO) was continuously atomized with the aid of pressurized air. The atomizer was operated at atomizing pressures of 0.1−0.5 MPa and gas-to-liquid ratio by mass (GLR) of 2%−50%. Basic spectral and time-resolved LIF characteristics of natural fluorescence of LHO, used for LIF based concentration measurements, are detailed. Instant distributions of concentration and flux were processed into time-average radial profiles and into radial profiles of normalized root-mean-square (rms) fluctuations. Time-average concentration profiles are bell shaped with maximum concentration at the spray centerline and exponential decrease with radial distance. Liquid concentration based half-angles vary with operation conditions between 7.9° and 12.2°. GLR causes narrowing of the spray angle while inlet pressure has an indistinctive effect. Time-average flux profiles resemble the concentration profiles but are narrower, with half-angles of 4.6°−6.4°. Radial profiles of rms fluctuations of concentration (and also flux) generally show a low value near the spray axis, increase with increasing radial distance, and show a maximum close to the spray edge. Overall values of the rms fluctuations are used as a measure of spray unsteadiness and are correlated with internal two-phase flow patterns predicted by a published flow map. The spray unsteadiness is relatively low when operated in annular flow regime and increases with change to bubbly flow regime. This confirms a direct link between the spray and internal flow.

对本文的引用
  1. Jedelský Jan, Zaremba Matouš, Malý Milan, Jícha Miroslav, Vít Tomáš, Dančová Petra, Novotný Petr, Characteristics of droplet motion in effervescent sprays, EPJ Web of Conferences, 67, 2014. Crossref

  2. Hong Moongeun, Fleck Brian A., Nobes David S., Unsteadiness of the internal flow in an effervescent atomizer nozzle, Experiments in Fluids, 55, 12, 2014. Crossref

  3. Zaremba Matouš, Weiß Lukas, Malý Milan, Wensing Michael, Jedelský Jan, Jícha Miroslav, Low-pressure twin-fluid atomization: Effect of mixing process on spray formation, International Journal of Multiphase Flow, 89, 2017. Crossref

  4. Hammad Farid A., Sun Kai, Che Zhizhao, Jedelsky Jan, Wang Tianyou, Internal two-phase flow and spray characteristics of outside-in-liquid twin-fluid atomizers, Applied Thermal Engineering, 187, 2021. Crossref

  5. Jin Yi, Yao Kanghong, He Xiaomin, Zhang Kai, Wang Yunbiao, E Jiaqiang, Experimental Study of the Effect of the Expansion Segment Geometry on the Atomization of a Plain-Jet Airblast Atomizer, International Journal of Aerospace Engineering, 2021, 2021. Crossref

  6. Mlkvik M., Stähle P., Schuchmann H.P., Gaukel V., Jedelsky J., Jicha M., Twin-fluid atomization of viscous liquids: The effect of atomizer construction on breakup process, spray stability and droplet size, International Journal of Multiphase Flow, 77, 2015. Crossref

  7. Zaremba Matouš, Kozák Jiří, Malý Milan, Weiß Lukas, Rudolf Pavel, Jedelský Jan, Jícha Miroslav, An experimental analysis of the spraying processes in improved design of effervescent atomizer, International Journal of Multiphase Flow, 103, 2018. Crossref

  8. Urbán András, Katona Bálint, Malý Milan, Jedelský Jan, Józsa Viktor, Empirical correlation for spray half cone angle in plain-jet airblast atomizers, Fuel, 277, 2020. Crossref

  9. Jedelský Jan, Jícha Miroslav, Spray characteristics and liquid distribution of multi-hole effervescent atomisers for industrial burners, Applied Thermal Engineering, 96, 2016. Crossref

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