Variation Mechanism of Aspiration Pressure at the Tip of Metal Delivery Tube in Supersonic Atomization

Abstract:

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The aspiration pressure variation at the tip of metal delivery tube in the supersonic atomization nozzle during gas-only atomization performance had been investigated in this work. The results reveal that the aspiration pressure is subambient at all operating pressures. A general trend is that with increasing atomization gas pressure, the value of aspiration pressure decreases at P0 between 0.5 and 1.5MPa, then increases as P0 ranges from 1.5~3.5MPa, finally decreases again at higher gas pressure (P0>~3.5MPa). When P0>2.0MPa, as the included angle α augments, the aspiration pressure ΔP increases. Meanwhile, the change range of aspiration pressure ΔP significantly enlarges when the jet included angle α raises from16 to 28º. The lager is the apex angle β of metal delivery tube, the greater is the aspiration pressure ΔP. And as the protrusion length of melt delivery tube h increases, the aspiration pressure ΔP decreases gradually.

Info:

Periodical:

Materials Science Forum (Volumes 675-677)

Edited by:

Yi Tan and Dongying Ju

Pages:

1049-1052

DOI:

10.4028/www.scientific.net/MSF.675-677.1049

Citation:

X. M. Zhao et al., "Variation Mechanism of Aspiration Pressure at the Tip of Metal Delivery Tube in Supersonic Atomization", Materials Science Forum, Vols. 675-677, pp. 1049-1052, 2011

Online since:

February 2011

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Price:

$35.00

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