Russian Journal of Applied Chemistry, 2009, Vol. 82, No. 12, pp. 2248−2258.
Pleiades Publishing, Ltd., 2009.
Original Russian Text
A.S. Pushnov, A.M. Kagan, S. Shinkunas, I. Gimbutite, R.F. Vitkovskaya, M.S. Trusov, V.I. Shishov, 2009, published in Khimicheskaya
Promyshlennost’, 2009, Vol. 86, No. 5, pp. 227−240.
PROCESSES AND DEVICES
OF CHEMICAL MANUFACTURES
Effect of Regular Nozzles of Plastic Net on Their Heat
and Mass Exchange
A. S. Pushnov
, A. M. Kagan
, S. Shinkunas
, I. Gimbutite
, R. F. Vitkovskaya
M. S. Trusov
, and V. I. Shishov
Мoscow State University of Environmental Engineering, Moscow, Russia
Moscow Chemical Society, Moscow, Russia
Кaunas Тechnical University, Kaunas, Lithuania
St. Petersburg University of Technology and Design, St. Petersburg, Russia
Joint Stock Company “VNIIG”, St. Petersburg, Russia
Received October 5, 2009
Abstract—Results of experiments to determine the number of evaporation in a gravitational liquid ﬁ lm ﬂ ow on
a regular nozzle made in the form of inclined plates of a plastic net with various slopes of the plates in countercurrent
water−air system were discussed. Phenomenon of two-way ﬂ ow of the liquid ﬁ lm on the surface of net parts of
the nozzle was established.
Polymeric materials of the net are becoming more
widely used in industry for hardware design of many
technological processes. To some extent cost features of
these materials contribute to this fact.
In some cases use of a permeable net of synthetic
monoﬁ laments, e.g. in the manufacture of the regular
nozzle parts for enhancing the heat and mass exchange,
is promising [1–3]. Experimentally established feature of
the two-way ﬂ ow of liquid on the net surface is important
advantage of such net of the synthetic monoﬁ laments.
Even in the case of local (point) falling the liquid jets
(drops) on any part of the net nozzle surface this surface
is entirely moistened and effectively involved in the heat
and mass transfer.
As was established earilier  geometric features of
the nozzle of a corrugated mesh effects on the efﬁ ciency
of recycle water cooling in cooling towers of water reuse
systems of industrial enterprises.
In particular, an increase in a corrugation pitch in the
case of their cross orientation relative to contancting the
gas and liquid ﬂ ows in a countercurrent phases results
in a signiﬁ cant decrease in a coefﬁ cient of hydraulic
This study is a continuation of . Results of
systematic experiments to determine the inﬂ uence of
the basic geometric parameters: the plane slopes and the
speciﬁ c surface area on the efﬁ ciency of an evaporative
cooling water and of hydraulic resistance are described
2. DESCRIPTION OF AN EXPERIMENTAL STAND,
TECHNIQUES OF EXPERIMENTS
AND THE NOZZLE SAMPLES
The experiments were conducted on experimental
stands of Joint Stock Company “VNIIG” (St. Petersburg),
Moscow State University of Environmental Engineering,
Kaunas Technical University, St. Petersburg State
University of Technology and Design. A scheme of the
stand for examination of aerothermal characteristics of