ROLE OF AIR INDUCTION NOZZLES IN HIGH SPEED
AIRSTREAMS
by
Clint
Hoffmann, Brad Fritz,
Contact: Clint
Hoffmann
Agricultural Engineer
US Dept. of Agriculture
USDA-ARS
2771 F&B Road
College Station, TX 77845
(979) 260-9521
Summary: Air induction nozzles have
been used for several years in ground spray applications as a means of
generating large droplets and reducing the potential for off-target movement of
sprays. Like any new technology, it is
important to gain a thorough understanding of how these air induction nozzles
work in high speed airstreams before placing them on aerial application
equipment. Several nozzles will be
evaluated under helicopter and fixed-wing aerial application conditions to
determine the effects of nozzle type, orifice size, and nozzle orientation on
spray droplet size. Through a
combination of pictures and droplet size data, guidelines will be generated to
help aerial applicators make informed decisions about the use of air induction
nozzles in their particular operation.
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