University*of*Liege,*Gembloux*Agro7Bio*Tech* · 2015. 5. 29. · Slide1/10...

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Slide 1/10 Sofiene Ouled Taleb Salah, Mathieu Massinon, Nicolas De Cock, Bruno Schiffers and Frederic Lebeau University of Liege, Gembloux AgroBio Tech 19/08/2014

Transcript of University*of*Liege,*Gembloux*Agro7Bio*Tech* · 2015. 5. 29. · Slide1/10...

Page 1: University*of*Liege,*Gembloux*Agro7Bio*Tech* · 2015. 5. 29. · Slide1/10 Sofiene&Ouled&Taleb&Salah,&Mathieu&Massinon,&Nicolas&De&Cock,& Bruno&Schiffers&and&Frederic&Lebeau& &

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Sofiene  Ouled  Taleb  Salah,  Mathieu  Massinon,  Nicolas  De  Cock,  Bruno  Schiffers  and  Frederic  Lebeau  

 University  of  Liege,  Gembloux  Agro-­‐Bio  Tech  

 

 

19/08/2014  

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 Context  

 

Δ adhesion,● rebond , x  fragmentaBon  

DriC  

FragmentaBon  

Extended  droplet  size  distribuBon  

Flat  fan  nozzles  

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Controlled  Droplet  Applica?on  (CDA)…  !  

Rotary  atomiser    (GRASP)    

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                       Compromise  in  termes  of  droplet  sizes  …  

AnB-­‐driC  nozzle  (Hardi  Injet  015)  

Rotary  atomiser  (Micromax  120)  

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ObjecBve  

The  objec?ve  is  to  inves?gate  whether  a  rotary  atomizer  with:      -­‐    a  60°  forward  ?lt    -­‐    a  reduced  driUable  droplet  propor?on  and  a  VMD              centered  around  300  µm      can  reduce  driU  poten?al  to  acceptable  levels  

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DriC  trials  

v  v  

v  

v  

v  

collectors lines (PTFE)

(300 mm length )

2,0 meters

§  Temperature: 20 oC ± 1°C. §  Relative humidity: 80% ± 5%. § Spray mixture: Tap water+0.1% Break Thru.

ISO 22856 (2008)

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Spray  characterisBcs    

Buse V10 (µm) V50 (µm) ou VMD

V90 (µm) Span (V90-V10/

V50)

Percentage by volume of

droplets <100 µm (%)

Percentage by volume of

droplets > 350 µm (%)

CDA (5000 rpm)

181 271 347 0.60 0.70 8

CDA (3500 rpm)

221 310 398 0.57 0.49 27

Hydraulic nozzle

(Teejet XR 110 02)

113 208 361 1.18 6 11

Anti-drift nozzle

(Hardi Injet 015)

177 325 514 1.03 0.99 41

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   VerBcal  profile  of  driC  at  2.0  meteres  

 

0  

10  

20  

30  

40  

50  

60  

70  

0   1   2   3   4   5   6  

Col

lect

ors p

ositi

ons (

cm)

Drift (%)    

Teejet  XR  11002_0°_208  µm  VMD_2m/s  

Hardi  Injet  015_0°_325  µm  VMD_2m/s  

Micromax  5000  rpm_60°_271  µm  VMD_2m/s  Micromax  3500  rpm_60°_310  µm  VMD_2m/s  Teejet  XR  11002_60°_208  µm  VMD_2m/s  

Hardi  Injet  015_60°_325  µm  VMD_2m/s  

ISO  22856  

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Cumula?ve  driU  measurements  at  2.0  m  downwind  

CDA

3500 rpm

CDA

5000 rpm

Hydraulic nozzle

Teejet XR11002

Anti-drift nozzle

Hardi Injet 015

Nozzle

orientation 60° forward 60° forward vertical

60°

forward vertical

60°

forward

Drift (%) 2.540 3.539 9.105 13.741 0.708 1.114

STD

0.12

0.17

0.591

0.75

0.04

0.07

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Poten?al  DriU    Index  (DIX)    

Micromax 120

3500 rpm

Micromax 120

5000 rpm Teejet XR11002 Hardi Injet 015

Nozzle

orientation 60° forward 60° forward vertical

60°

forward vertical

60°

forward

DIX (%) 36.53 44.05 48.27 100 8.43 10.98

The  60°  forward  ?lted  Teejet  XR11002  was  chosen  as  reference  nozzle  (100  %  of  driU)    

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Conclusion  

-­‐60°  forward  Blted  nozzles  increased  driC  relaBve  to  verBcally  oriented  nozzles.      -­‐Rotary  atomisers  with  a  narrow  droplet  size  distribuBon  centred  around  a  VMD  of  300µm  do  not  significantly  reduce  driC  comparaBvely  to  hydraulic  nozzles.        -­‐Turbulence  and   lower  entrained  air  flows  may  explain  driC  at  higher  sampling  locaBons  of  rotary  atomisers  comparaBvely  to  hydraulic  nozzles.    

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