Analogue experimental study of fiber formation on two-wheel spinner
ID Bizjan, Benjamin (Author), ID Širok, Brane (Author), ID Blagojevič, Marko (Author)

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In this paper, the process of mineral fiber formation was investigated experimentally on a two-wheel spinner by means of high-speed imaging. Analogue isomalt melt was fiberized at different rotational speeds of spinner wheels, melt flow rates and impingement positions so that the fiberization process was dynamically similar to an industrial mineral wool production process. Images of fiber formation and transport reveal highly complex dynamics of these processes, as fibers mostly occur in form of 3D mutually intertwined structures such as clusters, strands and veils periodically shedding from the melt film. Despite the complexity of flow structures, there is a clear trend of increasing mean fiber length and expansion angle of the coaxial fiber-laden flow as the Weber number and the ratio of melt film velocity to blowing air velocity are increased. The fiberization efficiency (ratio of fiber mass deposited on the collecting mesh to the mass of melt poured) is affected by the impingement position and flow rate of melt as well as the Weber number of melt film. The optimum efficiency was attained at 30° (1 o'clock) impingement position and the ratio of melt film to blowing air flow velocity close to unity.

Keywords:spinners, fiber formation, mineral wool, multiphase flow, primary layer, high-speed imaging
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Publication status:Published
Publication version:Version of Record
Number of pages:Str. 279-288
Numbering:Vol. 66, iss. 5
PID:20.500.12556/RUL-116198 This link opens in a new window
ISSN on article:0039-2480
DOI:10.5545/sv-jme.2020.6557 This link opens in a new window
COBISS.SI-ID:16312323 This link opens in a new window
Publication date in RUL:22.05.2020
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Record is a part of a journal

Title:Strojniški vestnik
Shortened title:Stroj. vestn.
Publisher:Zveza strojnih inženirjev in tehnikov Slovenije [etc.], = Association of Mechanical Engineers and Technicians of Slovenia [etc.
COBISS.SI-ID:762116 This link opens in a new window

Secondary language

Title:Analogna eksperimentalna študija tvorbe vlaken na dvokolesni centrifugi
Keywords:centrifuge, razvlaknjenje, mineralna volna, večfazni tok, primarna plast, hitre kamere


Funder:ARRS - Slovenian Research Agency
Project number:P2-0401
Name:Energetsko strojništvo

Funder:ARRS - Slovenian Research Agency
Project number:Z7-8271
Name:Izboljšanje procesa razvlaknjenja mineralne volne

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