Affiliation:
1. Faculty of Technology, University of Novi Sad, Novi Sad
2. Institute of Chemical Engineering, Vienna University of Technology, Vienna, Austria
Abstract
In this paper the influence of ventilation air velocity on properties of
metal working fluids (MWF) aerosol/mist is presented. Aerosol
characteristics were monitored in the chamber as well as at the entrance of
ventilation pipe by optical particle size analyzer. Aerosol was generated
from 6% water emulsion of three commercial MWF. Four different velocities,
less than the velocity of secondary atomization, were examined (1, 3, 6, 8
m/s). Droplets size distribution, mass concentration (mg/m3), as well as
number concentration (P/cm3) were measured and analyzed. From the results
obtained it may be seen that coalescence is more pronounced as the velocity
increases, although the number concentration decreases, due to higher air
dilution. Therefore, more droplets are in a whirling motion at higher air
velocities, hence more random collisions are possible. Further analysis
shows that there is one value of air velocity under which the maximum
difference between the aerosol in chamber and the aerosol at the entrance of
the pipe can be observed. This velocity could be named specific velocity and
depends on the given aerosol properties. It could be assumed that specific
velocity is conditioned by the properties of oil from which emulsion is
prepared. Oil viscosity and molar mass have greatest influence on the
specific velocity.
Publisher
National Library of Serbia
Subject
General Chemical Engineering,General Chemistry
Cited by
3 articles.
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