TSI Instruments 9307 Installation and operating instructions

OIL DROPLET GENERATORS
MODELS 9307 AND 9307-6
APPLICATION NOTE 9307-001 (A4)
Laskin nozzle oil droplet generator
models 9307 (single-jet) and 9307-6
(six-jet) are designed to generate
large amounts of seed particles for
the seeding of PIV or LDV flows. They
are also ideal for seeding in high-
speed flows for wind tunnel
experiments. These generators are
typically used with olive oil, but can
also be used with other fluids such as
DEHS or salt solutions (for
aerosolizing solid salt particles).
The oil droplet generator operates
when pressurized air atomizes oil in
the generator reservoir to produce
the droplets. An internal impactor
plate blocks large droplets from getting into the droplet stream exiting the device, allowing it to
generate particles with a reasonably narrow size distribution. Generally, a larger particle output
volume can be obtained without seriously affecting the droplet size range by increasing the inlet
pressure. A valve and pressure gauge arrangement provides an easy way to control the inlet air
pressure. Both models are equipped with an external gauge which indicates the oil level in the
atomizer chamber.
Instructions for Operation
The oil droplet generator is very easy to use. The seeding agent is added to the reservoir (typically
olive oil), and the unit is attached to a pressurized air supply. It is not necessary to remove the cover
of the unit to add the oil; the oil can be poured directly through the outlet port. The following steps
instruct users how to operate the generator, to provide the desired oil droplets as seed particles for
your PIV or LDV measurements:

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9307-001-A4 (8/6/2015) ©2015 TSI Incorporated Printed in U.S.A.
1. Using a funnel, add the seeding fluid
(typically olive oil) into the outlet port
chimney, as shown in Figure 1. It is not
necessary to completely fill the reservoir;
but enough oil is required to cover the
Laskin nozzles, which are located near the
bottom of the reservoir. About one inch
(2.54 cm) of oil is enough to cover the
nozzles on the fluid level viewing window,
shown in Figure 2.
Figure 1: Outlet Port
Chimney
Figure 2: Fluid Level
Viewing Window
2. Once the oil has been added, the unit can be attached to the
pressurized air supply. A standard 100 psi line is required.
Attach the pressure hose to the inlet pressure nozzle, as
outlined in Figure 3.
Figure 3: Pressure Hose
3. Adjust the pressure by turning the pressure adjust
valve on the pressure gauge, as shown in Figure 4.
A maximum gauge pressure of 25 to 30 psi is
typical for most standard pressure systems. When
opening the pressure valve, atomized oil will exit
the outlet port chimney. Take care to not breathe
in the atomized oil. It is important to use the oil
droplet generator in an area with adequate
ventilation. The typical mean diameter of the oil
droplets is around 0.5 to 1.0 micron.
Figure 4: Pressure Gauge Showing the
Inlet Pressure