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    Experimental and numerical study on soot formation in laminar diffusion flames of biodiesels and methyl esters

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    Name:
    B Tian et al. Proci 2020.pdf
    Embargo:
    2022-08-05
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    3.002Mb
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    Authors
    Tian, Bo
    Anxiong, Liu
    Chong, Cheng Tung
    Fan, Luming
    Ni, Shiyao
    Jo-Han, Ng
    Stelio, Rigopoulos
    Kai, Luo
    Hochgreb, Simone
    Affiliation
    University of Derby
    University College London
    Shanghai Jiao Tong University
    University of Cambridge
    University of Southampton Malaysia
    Imperial College London
    Issue Date
    2020-08-05
    
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    Abstract
    Biodiesel and blends with petroleum diesel are promising renewable alternative fuels for engines. In the present study, the soot concentration generated from four biodiesels, two pure methyl esters, and their blends with petroleum diesel are measured in a series of fully pre-vapourised co-flow diffusion flames. The experimental measurements are conducted using planar laser induced-incandescence (LII) and laser extinction optical methods. The results show that the maximum local soot volume fractions of neat biodiesels are 24.4% - 41.2% of pure diesel, whereas the mean soot volume fraction of neat biodiesel cases was measured as 11.3% - 21.3% of pure diesel. The addition of biodiesel to diesel not only reduces the number of inception particles, but also inhibits their surface growth. The discretised population balance modelling of a complete set of soot processes is employed to compute the 2D soot volume fraction and size distribution across the tested flames. The results show that the model also demonstrates a reduction of both soot volume fraction and primary particle size by adding biodiesel fuels. However, it is not possible to clearly determine which factors are responsible for the reduction from the comparison alone. Moreover, analysis of the discrepancies between numerical and experimental results for diesel and low-blending cases offers an insight for the refinement of soot formation modelling of combustion with large-molecule fuels.
    Citation
    Tian, B., Anxiong, L., Chong, C., T., Fan, L., Ni, S., Jo-Han, N., Stelio, R., Kai, L., and Hochgreb, S. (2020). 'Experimental and numerical study on soot formation in laminar diffusion flames of biodiesels and methyl esters'. Proceedings of Combustion Institute, pp. 1-10.
    Publisher
    Elsevier
    Journal
    Proceedings of Combustion Institute
    URI
    http://hdl.handle.net/10545/625082
    DOI
    10.1016/j.proci.2020.06.074
    Additional Links
    https://www.journals.elsevier.com/proceedings-of-the-combustion-institute
    https://doi.org/10.1016/j.proci.2020.06.074
    Type
    Article
    Language
    en
    ISSN
    1540-7489
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.proci.2020.06.074
    Scopus Count
    Collections
    Department of Mechanical Engineering & the Built Environment

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