The Affect of Flat-fan Nozzle Angle on Aerial Spray Droplet Spectra Presented at ASAE/NAAA Technical...
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Transcript of The Affect of Flat-fan Nozzle Angle on Aerial Spray Droplet Spectra Presented at ASAE/NAAA Technical...
![Page 1: The Affect of Flat-fan Nozzle Angle on Aerial Spray Droplet Spectra Presented at ASAE/NAAA Technical Session 39 th Annual NAAA Convention Silver Legacy.](https://reader035.fdocuments.us/reader035/viewer/2022062219/5a4d1b6e7f8b9ab0599b4aad/html5/thumbnails/1.jpg)
The Affect of Flat-fan Nozzle Angle on Aerial Spray Droplet Spectra
Presented at ASAE/NAAA Technical Session39th Annual NAAA Convention
Silver Legacy Hotel and CasinoDec. 5, 2005
Robert E. Wolf, Scott Bretthauer, Dennis Gardisser
Paper # AA05-003
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Objective:
The objective of this study was to evaluate the affect of spray angel on flat-fan droplet spectrums for fixed wing aerial applications.
Patterns?Compared to USDA Models?
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Materials and Methods:
Multiple studies KS, CO, IL Multiple Aircraft
• Cessna 188 - 2• AT 502• AT 802 - 2• 510 Thrush
CP11TT with CP aerial flat-fan nozzles Multiple Angle Tests Collected Spray Droplets on WSP Compared to USDA Model
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Materials and Methods: Kansas Trial – Wamego Airport
• CP11TT with flat-fan nozzles• 2 GPA (35-4008 nozzles)• 5 GPA (35-4020 nozzles) • 40 psi
Average speed - 115 mph by GPS
Sprayed into head wind Application height 10-12 feet Multiple angles of orientation
• 8,15,30,45,60,75• CP-06 Swivel
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CP Swivel:Quick change angle device15 degree incrementsFlexibility to increase the angle of
attackWill this influence the droplet
spectrum?
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Materials and Methods: Illinois Trials – Mattoon, Lincoln
• CP11TT with flat-fan nozzles• 2, 3, 4, and 5 GPA• 4015, 4020, 4025, 4030• 28 - 46 psi
AT502, AT802’s, 510 Thrush, Cessna 188
130, 150, 188 mph GPS measured
Sprayed into head wind Application height 10-12 feet Orientation – 8 and 30 degrees
• Determined by rotating the nozzle body and the nozzle
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Collection Procedure:
1 pass per angle Water sensitive paper on
each collector• 1 x 3 or 2 x 3 inch
Collectors evenly spaced across the swath width
Analyzed with DropletScan and composite statistics reported
DV0.1, VMD, DV0.9 Compared to USDA Model
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USDA Aerial Nozzle Atomization Models
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Model compared to Measured @ 2 GPA
415319 304 259 244 224
390
0
200
400
600
800
8 15 30 45 60 75
Nozzle Angle
Mic
rons
VD 0.1 VD0.1-M VMD VMD-M VD 0.9 VD0.9-M
Cessna 188 (CP11TT-4008 @40 PSI, 35 nozzles, 115 MPH)
Wamego
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Model compared to Measured @ 5 GPA
495410 385 360 314 333
0
200
400
600
800
8 15 30 45 60 75
Nozzle Angle
Mic
rons
VD 0.1 VD0.1-M VMD VMD-M VD 0.9 VD0.9-M
Cessna 188 (CP11TT-4020 @40 PSI, 35 nozzles, 115 MPH)
Wamego
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Orifice and Angle Effect on Droplet Spectra
428 433323
0100200300400500600700800
8 8 30
4020 4025 4025
Nozzle Orifice - Angle
Mic
rons
VD 0.1
VMD-M
VMD
VD 0.9
Illinois
CP11TT-4020/25 @ 4/5 GPA-40 PSIAT 502 @ 134 MPH (46 nozzles)
A
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Orifice Size Effect on Droplet Spectra
354400 389
0100200300400500600
8 8 8
4015 4025 4030
Nozzle Orifice - Angle
Mic
rons
VD 0.1
VMD-M
VMD
VD 0.9
IllinoisCP11TT-4015/25/30 @ 2,3,5 GPA-40 PSIAT 802 @ 150 MPH (39-50 nozzles)
B
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Orifice and Angle Effect on Droplet Spectra
403 380 353 339
0100200300400500600700
8 8 8 30
4015 4025 4030 4030
Nozzle Orifice - Angle
Mic
rons
VD 0.1
VMD-M
VMD
VD 0.9
CP11TT-4015/25/30 @ 2,3,5 GPA-40 PSIAT 802 @ 150 MPH (39-49 nozzles)Illinois
C
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Angle effect on Droplet Spectra
453367
0100200300400500600700800
8 30
4030 4030
Nozzle - Angle
Mic
rons
VD 0.1
VMD-M
VMD
VD 0.9
IllinoisCP11TT-4030 @ 5 GPA-50 PSIThrush @ 130 MPH (37 nozzles)
D
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Angle Effect on Droplet Spectra
430343
0100200300400500600700
8 30
4015 4015
Nozzle - Angle
Mic
rons
VD 0.1
VMD-M
VMD
VD 0.9
IllinoisCP11TT-4015 @ 2 GPA-28 PSICessna 188 @ 115 MPH (33 nozzles)
E
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JARBA (Rotating Boom)
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JARBA Rotating Boom Spraying Systems 4015
0100200300400500600700
0 45 90
Angle
mic
rons
VD 0.1
VMD
VD 0.9
Goodland 2003
AT 502 – 140 MPH - 45
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Summary of findings - Kansas:Nozzle angle increase - results in smaller
droplets• Wamego with Cessna 188 @ 115 MPH• At 2 and 5 GPA• For VD0.1, VMD, and VD0.9
Nozzle orifice size increase - results in larger droplets• 2 GPA resulted in droplets smaller than the USDA
Model• 5 GPA was better matched to the USDA Model
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Summary of findings - Illinois:Nozzle orifice size increase - results in larger
droplets• Not always true and not much effect• AT 502 – slight increase• AT 802’s – increase and decrease
Nozzle angle increase - results in smaller droplets• True for all tests• For VD0.1, VMD, and VD0.9• All the Air Tractors and Thrush droplets - larger than
the USDA Model• Cessna 188 matched the USDA Model
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Conclusions: Increasing the nozzle angle reduces the size of the
droplet spectraThese data sets indicate about 2-3 micron
reduction in the VMD for each degree of downward slope
Trends are consistent with the USDA ModelsAt higher speeds the measurements tended to
have a droplet spectra larger the USDA Model predicted
Angle adjustment is an option for adjusting the droplet spectrum
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Acknowledgements:Cary RuckerRick ReedHarley CurlessDon Haley
David KurtzLes CadyCarolyn Baecker