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雾化与喷雾
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ISSN 打印: 1044-5110
ISSN 在线: 1936-2684

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雾化与喷雾

DOI: 10.1615/AtomizSpr.v13.i23.100
23 pages

EFFECT OF SOLID PARTICLE CHARACTERISTICS ON SUSPENSION ATOMIZATION

Basel Mulhem
Chemical Engineering Department, University of Bremen, Bremen, Germany
Gunther Schulte
Chemical Engineering Department, University of Bremen, Bremen, Germany

ABSTRACT

Suspensions containing solid particles with different sizes and different bulk liquids have been atomized by means of a twin-fluid atomizer. From drop size analysis in the spray it was found that the solid particle size is the main influence on the drop size distribution. Consequently, the atomization of a suspension can be divided into different regimes as follows:
Atomization of suspensions with large particles, Dv50 > 50 mm. The drop size distribution in this range is bimodal, with two peaks (solid and liquid peaks). At lower values of (Weacro ґ ALR) the liquid diameter peak is controlled by the solid particle size and at higher values of (Weacro ґ ALR) it is controlled by the air stream velocity like the atomization of a pure liquid.
Atomization of suspensions with small particles, Dv50 < 50 mm. The drop size distribution is monomodal. The atomization mechanisms of suspensions containing fine solid particles are very similar to the atomization of the pure suspension liquid.


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