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国际能源材料和化学驱动期刊

每年出版 6 

ISSN 打印: 2150-766X

ISSN 在线: 2150-7678

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: 0.7 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: 0.7 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: 0.1 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: 0.00016 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: 0.18 SJR: 0.313 SNIP: 0.6 CiteScore™:: 1.6 H-Index: 16

Indexed in

MEASUREMENTS OF DIFFERENTIAL MOLECULAR DIFFUSION IN TURBULENT NONPREMIXED JET FLAMES OF H2-CO2 FUEL

卷 3, 册 1-6, 1994, pp. 479-497
DOI: 10.1615/IntJEnergeticMaterialsChemProp.v3.i1-6.500
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摘要

In this paper we explore the effects of differential diffusion in nonpremixed turbulent jet flames. Pulsed Raman scattering spectroscopy is used to measure temperature and species concentrations in chemically reacting jets of H2-CO2 into air over a range of cold jet Reynolds numbers from 1,000 to 30,000. Experimental results indicate that differential diffusion strongly affects hydrogen element mixture fractions, ξH, in nonpremixed turbulent jet flames of H2-CO2 fuel at all Reynolds numbers measured. Differential diffusion of H2 and H2O creates a net flux of hydrogen element toward the stoichiometric contour on the rich side of the flame. This allows a maximum in ξH (calculated from the mass fraction of hydrogen atoms in all hydrogen-containing species) to occur near stoichiometric burning. Small values of ξH at large values of ξC, the carbon element mixture fraction, arc observed at all Reynolds numbers, and indicate that there is a depletion of elemental hydrogen from fuel-rich mixtures due to differential diffusion of H2 and CO2. In turbulent flames, differential diffusion also creates local fluctuations in the differential diffusion variable zH, defined as the difference between ξH and ξC. This results from fluctuations in instantaneous values of zH at a given value of mixture fraction, as well as from local fluctuations in mixture fraction. Strained laminar opposed flow flame calculations with differential diffusion are compared to experimentally measured results in turbulent nonpremixed jet flames of H2-CO2 fuel. Values of ξH in the nonpremixed jet flames are much lower than values of ξH in strained laminar flames of the same H2-CO2 fuel, when values of ξC are the same.

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