METHODS OF REDUCING THE POWER REQUIREMENTS
OF VENTILATION SYSTEMS. PART 4. THEORETICAL PREREQUISITES
FOR THE CREATION OF DUST LOCALIZING DEVICES
WITH SWIRLING AIR FLOWS
I. N. Logachev,
K. I. Logachev,
O. A. Averkova,
V. N. Azarov,
and V. A. Uvarov
Translated from Novye Ogneupory, No. 8, pp. 53 – 58, August, 2014.
Original article submitted January 14, 2014.
A method of reducing dust entrainment from ventilation shelters through the use of swirling flows is proposed.
The dynamics of dust aerosols in swirling ventilated currents is investigated by means of newly developed
software and algorithmic support for the study of processes of dust entrainment in a ventilation network pro
duced by devices that localize dust release.
Keywords: ventilation shelter, transfer of granular materials, reduction of power requirements of ventilation
MANAGEMENT OF SWIRLING FLOWS
The use of ventilation shelters with swirling air flows, di-
agrams of which are presented in Fig. 15, is proposed as a
means of reducing the power requirements of ventilation
shelters and increasing their efficiency, that is, reducing dust
emissions into the environment.
The shelter in Fig. 15a, differs from traditionally used
shelters in that a bladed rotor in the form of a “squirrel-cage”
structure is installed at the entry to the air exhaust sleeve. As
the suctioned air travels across the rotor blades, the rotor
starts to rotate and a swirling air field arises around it. Such a
field may also be created by means of the blades built into a
pump cylinder along a screw line (Fig. 15b). The suctioned
flow enters through a longitudinal recess, traveling along a
guide that forces the flow against the inner surface of the cyl
inder and acts on the surface of the inner protrusions. A driv
ing torque that forces the cylinder, which is mounted on her
metically sealed bearing units, to rotate then arises. Thus, a
swirling air field arises. The effect of the centrifugal forces
on the dust particles hampers their entrapment into the suc-
tion or into the inner cavity of the rotor while the swirling
aerodynamic field promotes their deposition onto the lower
part of the ventilation shelter. The air suctioned out of the
Refractories and Industrial Ceramics Vol. 55, No. 4, November, 2014
1083-4877/14/05504-0365 © 2014 Springer Science+Business Media New York
Parts 1, 2, and 3 of the study were published in the journal, Novye
Ogneupory, Nos. 2, 4, and 6 for 2014. The enumeration of the fig
ures and formulas in this part of the study are continued from
Parts 1, 2, and 3.
FGBOU VPO Shukhov State Technological University, Belgo
Fig. 15. Ventilation shelter with swirling air flows: 1) loading
trough; 2) housing of shelter; 3) air exhaust sleeve; 4) bladed
wheeled rotor; 5) pump cylinder; 6) bearing unit.