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    Soot measurement in diluted methane diffusion flames by multi-pass extinction and laser-induced incandescence

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    Authors
    Tian, Bo
    Gao, Yi
    Zhang, Cen
    Hochgreb, Simone
    Affiliation
    University of Cambridge
    Issue Date
    2018-03-20
    
    Metadata
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    Abstract
    Multi-pass cavity line-of-sight extinction (MPC-LOSE) and laser-induced incandescence (LII) techniques are deployed to measure the soot volume fraction in a series of nitrogen-diluted flames, which produce only ppm volume mass fractions of soot. The separate suppression effects on soot formation of direct fuel dilution and indirect effects of temperature and residence time are interpreted by using a numerically calculated flow velocity and temperature field using a one-step fast chemistry model. The experimentally determined rate of soot formation is shown to obey approximately the same function of the local temperature for all dilution cases. The results show that a simple one-step reaction model using previously measured activation energies can account for the dilution effect with good accuracy. The results show that the direct effect of dilution on concentration is comparable to the effects of changing the temperature estimated local temperature and residence time.
    Citation
    Tian, B., Gao, Y., Zhang, C. and Hochgreb, S., (2018). 'Soot measurement in diluted methane diffusion flames by multi-pass extinction and laser-induced incandescence'. Combustion and Flame, 192, pp. 224-237.
    Publisher
    Elsevier BV
    Journal
    Combustion and Flame
    URI
    http://hdl.handle.net/10545/624862
    DOI
    10.1016/j.combustflame.2018.01.037
    Additional Links
    https://www.sciencedirect.com/science/article/pii/S0010218018300415
    https://www.repository.cam.ac.uk/handle/1810/274117
    Type
    Article
    Language
    en
    ISSN
    0010-2180
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.combustflame.2018.01.037
    Scopus Count
    Collections
    Department of Mechanical Engineering & the Built Environment

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