3B SCIENTIFIC PHYSICS 8404250 Instructions D'utilisation page 3

3B SCIENTIFIC ® PHYSICS
Instruction sheet
08/06/DML
1. Description
The air jet is used in conjunction with a blower to
generating an almost uniform flow of air, as re-
quired in experiments on fluid dynamics.
The plastic air jet consists of a hemispherical pres-
sure chamber equipped with 50 single tubular
nozzles which are arranged parallel to one an-
other. The arrangement of the tubular nozzles has
been specifically selected to ensure that the airflow
generated by the blower exits the pressure cham-
ber with a minimum of resistance and in such a
way that the flow is evenly distributed among the
tubes. Air blows out of the nozzles at high speed
such that the moving flow is cylindrical in shape.
A ring runs around the ends of the nozzles and
forms the actual outlet of the jet. As a result of the
high velocity of the air flow, the static pressure
around the nozzles is low. This means that sur-
rounding air is sucked from the sides and into the
high-speed flow. The combination of the air emerg-
ing directly from the nozzles and the air sucked in
from the sides gives rise to a flow of air that is
largely uniform and laminar. Any differences in the
Air jet (Laminator) 8404250
1
1 Pressure chamber
2 Single nozzle
3 Mounting stem
4 Air outlet ring
velocity of the air flow which initially occur locally
around the tubes do not have an adverse effect in
most experiments and can hardly be detected at a
distance of approximately 200 mm from the air
outlet.
The air jet is equipped with a mounting stem by
which it can be attached to a stand.
2. Technical data
Air inlet opening:
Air outlet ring:
No. of individual nozzles:
Individual nozzles:
Dimensions:
Weight:
33 mm Ø
120 mm Ø
50
4 mm Ø
255 mm x 150 mm Ø
350 g approx.