Software
"Calculation of PARAMETERS centrifugal-hydraulic
Atomisation"(CENFOR)
Application
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The programme "Cenfor"
is intended for calculation
of technological and design
data for Centrifugal-Hydraulic
Atomisation (CHA) of various
liquids and melts. the method
CHA is used for powders and
shot production. The method
CHA mean that the liquid metal
under the pressure (see the
figure) enters tangentially
to the swirling chamber 2
of centrifugal nozzle (CN)
through the channels 1 and
obtainig rotary movement.
On output from the nozzle
3 rotating melt first forms
the film 4 under influence
of centrifugal forces . The
film is unstable and breaks
up onto drops 5.
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The programme allows to decide 3 tasks:
DIRECT TASK. Using known design
parameters of centrifugal nozzle CN (D-diameter
of the swirling chamber, Dt- effective
diameter of tangential channels, DN -
diameter of the nozzle, N- number of channels)
and initial technical characteristics
of CHA process (pressure of melt and gas)
is possible to determine target parameters
of atomisation method (diameter of drops,
melt flow rate, velocity and angle of
drops departure from nozzle, etc)
RETURN TASK. Technical characteristics
of CHA process will ensure necessary parameters
of CN design.
DISTRIBUTION of DROPS. It allows
to determine distribution parameters of
drops according to their sizes: relative
amount (%) of drops in the certain faction,
mean mass diameter, median and mode of
distribution.
Example of calculation.
Metal: Mg; Gas atmosphere: Ar.
Design data of the nozzle:
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D,
mm
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Dt
, mm
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N
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DN,
mm
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8.3
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2
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2
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1.5
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Technological parameters of atomisation:
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Р,
bar
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r
,
ru/m3
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Q,
ru/hour
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L,
mm
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R,
mm
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V,
m/s
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H,
mkm
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d,
mkm
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a
, degrees
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6
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1.625
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58.1
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13.2
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11.4
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20.4
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7.7
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612
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76.3
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Р - pressure of melt, r - gas density,
Q - melt flow rate, L - film length, R
- film radius, V - velocity of drop's
flight, H - film thickness, d - diameter
of drop, N - amount of channels, a - atomisation
angle
Calculation basis.
The results of theoretical and experimental
researches conducted in Ural firm NETRAMM
laboratory on various metals and alloys,
and literary dates on atomisation of various
cold liquids were used.
Model Tests.
The results of calculations agreed to significant
experimental data obtained from the literature
and own researches of the authors. The
error of calculations does not exceed
on the average 5-10 %.
Copyright.
The program is created by Ural firm NETRAMM.
The offers.
We can make calculations for You according
to Your data (parameters) using the given
program, so that you could be convinced
of reliability of outcomes of calculations
and convenience in the work with the program.
You can also make the order for purchase
of the program.
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