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Faculty of Mechanical Engineering, Lj. (FSLJ)
  • Experimental investigation of melt fiberization from a perforated rotor spinning machine
    Bizjan, Benjamin ; Peternelj, Marko, strojnik, 1988- ; Širok, Brane
    Fiber formation from molten fructose sugar was investigated experimentally on a spinning machine with a hollow perforated rotor. The fiberization process was visualized by a high-speed camera in ... different operating points obtained by variation of melt temperature and rotor rotational speed. Contours of the forming fibers were found to significantly depend on the rotor rotational speed and melt temperature, approaching involute shape with little statistical variability at sufficiently high Weber and Rossby numbers. After exiting fiberization orifices, melt jets contracted significantly and over a relatively short distance. Surprisingly, final fiber diameter rose with the Weber number due to an increase in Rossby number reducing the degree of fiber longitudinal stretching. Fiber contours were found to be initially smooth, but developing large amplitude transversal instabilities farther downstream up to a point when fiber structure is completely disrupted, creating random and highly complex new flow structures. A structure optimal for fibrous end products may be attained by controlling initial melt superheat and assuring that fibers are cooled below the glass transition temperature.
    Source: Chemical engineering research & design. - ISSN 0263-8762 (Vol. 104, Dec. 2015, str. 626-637)
    Type of material - article, component part
    Publish date - 2015
    Language - english
    COBISS.SI-ID - 14276635

    Link(s):

    http://www.sciencedirect.com/science/article/pii/S0263876215003792
    DOI

source: Chemical engineering research & design. - ISSN 0263-8762 (Vol. 104, Dec. 2015, str. 626-637)

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