Spray adjuvant effects on droplet size spectra measured by three laser-based systems in a high-speed wind tunnel

Clint Hoffmann, W., Hewitt, A. J., Ross, J. B., Bagley, W. E., Martin, D. E. and Fritz, B. K. (2008). Spray adjuvant effects on droplet size spectra measured by three laser-based systems in a high-speed wind tunnel. In: Pesticide Formulations and Delivery Systems, 26th Volume: Reassessing Pesticide Technologies. Pesticide Formulations and Delivery Systems: Reassessing Pesticide Technologies, Dallas, TX, (60-71). 17 - 20 October 2005.


Author Clint Hoffmann, W.
Hewitt, A. J.
Ross, J. B.
Bagley, W. E.
Martin, D. E.
Fritz, B. K.
Title of paper Spray adjuvant effects on droplet size spectra measured by three laser-based systems in a high-speed wind tunnel
Conference name Pesticide Formulations and Delivery Systems: Reassessing Pesticide Technologies
Conference location Dallas, TX
Conference dates 17 - 20 October 2005
Proceedings title Pesticide Formulations and Delivery Systems, 26th Volume: Reassessing Pesticide Technologies   Check publisher's open access policy
Series ASTM Special Technical Publication
Place of Publication West Conshohocken, PA United States
Publisher ASTM International
Publication Year 2008
Year available 2008
Sub-type Fully published paper
Open Access Status
ISBN 9780803134034
ISSN 0066-0558
Volume 1478
Start page 60
End page 71
Total pages 12
Collection year 2009
Language eng
Abstract/Summary Spray droplet size has long been recognized as the most important variable that aerial applicators can influence to mitigate spray drift from the application site. There are several different technologies that are used by researchers to measure droplet size from spray nozzles. The objective of these studies was to determine the influence of eight spray adjuvants on the droplet size spectrum produced by two nozzles in a high-speed wind tunnel when characterized using three different droplet size measurement systems. The adjuvant, nozzles, and airspeeds used in these studies are commonly used by aerial applicators. Three droplet sizing systems (Malvern laser diffraction, PMS optical array probe, and LaVision laser imaging) were simultaneously operated to measure the spray droplet size spectra for each adjuvant, air-speed, and nozzle combination. Two spray nozzles (a D6-46 nozzle and a D2 straight stream nozzle) were evaluated in a high-speed wind tunnel at airspeeds of 45 and 58 m/sec. There were significant differences in the droplet size spectra produced by the eight spray adjuvants tested. There were also significant differences between the droplet size values reported by the three measurement systems (Malvern, LaVision, and PMS) evaluated; however, there was considerable agreement trendwise. In general, the Malvern reported smaller spray droplet size spectra values than the LaVision, while the PMS system generally reported the largest spray droplet size spectra values. These tests are the first reported studies where all three droplet sizing systems were operated simultaneously. Copyright
Subjects 2500 Materials Science
Keyword Adjuvants
Aerial application
Droplet imaging system
Droplet measurement
Droplet size
Laser diffraction
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Conference Paper
Collection: Sustainable Minerals Institute Publications
 
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Created: Wed, 27 Nov 2013, 03:12:59 EST by System User on behalf of Centre for Pesticide Application and Safety