1070-4272/02/7502-0235 $27.00 C 2002 MAIK [Nauka/Interperiodica]
Russian Journal of Applied Chemistry, Vol. 75, No. 2, 2002, pp. 235!240. Translated from Zhurnal Prikladnoi Khimii, Vol. 75, No. 2, 2002,
Original Russian Text Copyright + 2002 by Protod’yakonova, Aniskin, Sleptsov.
PROCESSES AND EQUIPMENT
OF CHEMICAL INDUSTRY
Experimental Study of Gas-Fluid Jet Formed
by Single-Flare Atomizer
O. I. Protod’yakonova, S. V. Aniskin, and I. E. Sleptsov
St. Petersburg State Technical University, St. Petersburg, Russia
Received November 15, 2001
Abstract-A gas-fluid jet outflowing from a single-flare atomizer and the possibility of a pronounced
change in the nature of the spraying density distribution in a free polydisperse gas-fluid jet with increasing
distance from the atomizer nozzle were studied experimentally.
Apparatus with gas-fluid jets formed with single-
flare atomizers are widely used in wet cleaning of
industrial gas discharges.
In [1, 2], a model of motion of such a jet was de-
veloped, possessing certain advantages over the pre-
viously proposed models . For example, the gas
velocity distribution had been assumed  to be uni-
form across the jet in constructing a model of a gas-
fluid jet outflowing from a single-flare atomizer.
The model constructed in [1, 2] was based on the
assumption of a nonuniform distribution of gas ve-
locity across the jet, with a maximum on the jet
axis. This kind of distribution of the parameter is
characteristic of gas jets in general and those devel-
oping in a flow of fluid drops, in particular .
The hydrodynamic model proposed in  takes
into account the type of spraying density distribution
across the flare. However, this model replaces the real
polydisperse flow of drops in a gas-fluid jet with
a monodisperse flow with drops whose diameter is
equal to the average volume-surface drop size of the
polydisperse flow. The model of a gas-fluid jet, de-
veloped in [1, 2], takes into account not only the
type of the spraying density distribution function, but
also the type of the drop size distribution function,
i.e., the dispersion composition of the gas-fluid jet.
These functions should be set in the boundary con-
ditions for the model equations.
The aim of this study was to confirm experimental-
ly the validity of the model of the flow of a gas-fluid
jet, developed in [1, 2]. The calculations performed
in terms of this model demonstrated that finely dis-
persed fractions of drop starting their motion on
the flare periphery are shifted toward its axis much
faster than fractions with larger drops do . An
experimental verification of this result would give
reason to consider the model discussed here adequate
to the object of study.
To assess the adequacy of the given model, it is
necessary to obtain experimentally the spraying den-
sity distribution function at different distances from
the atomizer nozzle and compare it with a similar
function found by solving the model equations.
However, to obtain this solution, it is necessary to
specify the boundary conditions of these equations.
To accomplish this task, it is necessary to have, first,
the analytical form of the spraying density distribution
function in the region close to the atomizer nozzle
and, second, the drop size distribution function, i.e.,
a description of the dispersion composition of the
drop flow. Obtaining such an information is also
a part of the experimental verification of the model
of a polydisperse jet, considered here.
Thus, the general task of the given study can be
accomplished by solving successively the following
two concrete problems.
One of these involves an experimental determina-
tion of the analytical form of the spraying density
and drop size distribution functions. These functions
appear in the boundary conditions of the equations
constituting the gas-fluid jet model .
The other consists in solving the equations of the
model of a gas-fluid jet with the specified boundary
conditions and in verifying the adequacy of the gas-
fluid jet model by comparing the obtained solution