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Atomization and Sprays
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ISSN Imprimer: 1044-5110
ISSN En ligne: 1936-2684

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Atomization and Sprays

DOI: 10.1615/AtomizSpr.2011002846
pages 149-158

EXTRAPOLATION OF DROPLET CATCH MEASUREMENTS IN AEROSOL APPLICATION TREATMENTS

Lav R. Khot
Citrus Research and Education Center, Institute of Food and Agricultural Sciences (IFAS), University of Florida, Lake Alfred, Florida 33850, USA
David R. Miller
Department of Natural Resources and Environment, University of Connecticut, Storrs, Connecticut 062692, USA
April L. Hiscox
Department of Geography, University of South Carolina, Columbia, South Carolina 29208, USA
Masoud Salyani
University of Florida
Todd W. Walker
East Baton Rouge Parish Mosquito Abatement and Rodent Control, Baton Rouge, Louisiana, USA
Muhammad Farooq
Navy Entomological Center of Excellence, Jacksonville, Florida, USA

RÉSUMÉ

This paper reports on the methodology to quantify remote measurements of airborne aerosols using a light detection and ranging (LIDAR) system. Calibration with both active and passive sampling techniques was examined in a field study to define the use of calibrated LIDAR to quantify spray distribution across both space and time. The LIDAR was used to scan vertical cross-sections of the spray plume downwind from a moving sprayer path. Active and passive field samplers were used to obtain the spray collection at 10 m from the sprayer path (at 500 m from LIDAR). A thermal fogger and two ultra-low-volume aerosol applicators were used to produce aerosol spray in both day and nighttime applications. The results showed linear relationships between LIDAR backscatter from the spray plume and spray tracer collection on samplers (R2 ≈ 0.77). A linear transfer function from the active samplers was applied to quantify spray plume flux across scanned cross-sections at various distances from the spray path. Plume-to-plume variability statistics were consistent with previous studies in turbulent atmospheres. Examples of LIDAR plume cross-section scans with extrapolated plume fluxing downwind are presented.


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