Henri Coanda was a Romanian aeronautical engineer most known
for his work developing what is today known as the Coanda effect. The Coanda
effect is the propensity of a fluid to adhere to the walls of a curved
surface. A moving stream of fluid will follow the curvature of the surface
rather than continuing to travel in a straight line. This effect is
used in the design of an airplane wing to produce lift. The top of the wing
is curved whereas the bottom of the wing remains straight. As the air comes
across the wing, it adheres to the curved surface, causing it to slow down
and create a higher pressure on the underside of the wing. This is
referred to as lift and is what allows an airplane to fly.
The Coanda effect is also the driving force behind many of EXAIR’s Intelligent Compressed Air
Products. Throughout the catalog you’ll see us talking about air
amplification ratios. EXAIR products are designed to take advantage of this
phenomenon and entrain ambient air into the primary air stream. Compressed
air is ejected through the small orifices creating air motion in their
surroundings. Using just a small amount of compressed air as the power
source, Super Air Knives,
Air Nozzles,
and Air Amplifiers all
draw in “free” ambient air amplifying both the force and the volume of
airflow.
Super Air Knives provide the greatest amount of air
amplification at a rate of 40:1, one part being the compressed air supply and
40 parts ambient air from the environment. The design of the Super Air Knife
allows air to be entrained at the top and bottom of the knife, maximizing the
overall volume of air. Super Air Nozzles and Super Air Amplifiers also use
this effect to provide air amplification ratios of up to 25:1, depending on
the model.
The patented shim design of the Super Air Amplifier allows it
to pull in dramatic amounts of free surrounding air while keeping sound
levels as low as 69 dBA at 80 psig! The compressed air adheres to the Coanda
profile of the plug and is directed at a high velocity through a ring-shaped
nozzle. It adheres to the inside of the plug and is directed towards the
outlet, inducing a high volume of surrounding air into the primary air
stream. Take a look at this video below that demonstrates the air entrainment
of a Super Air Amplifier with dry ice:
Utilizing the Coanda effect allows for massive compressed air
savings. If you would like to discuss further how this effect is applied to
our Super Air Knives, Air Amplifiers, and Air Nozzles give us a call. We’d be
happy to help you replace an inefficient solution with an Engineered
Intelligent Compressed Air Product.
Distribuidor em Portugal: TECMER-Tecnologia e Mercado ,Lda Tel:+ 351 252317314 /+351932308640 Email:j.araujo@tecmer.pt /geral@tecmer.pt |
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