풍동실험에 의한 붐식 살포 농약의 노즐형태와 분사압력에 따른 비산 특성 분석
Analyzing Drift Patterns of Spray Booms with Different Nozzle Types and Working Pressures in Wind Tunnel
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초록
With rising concerns about pesticide spray drifts, this study analyzed the drift patterns of two typically-used nozzles, XR nozzle and AI nozzle,concerning their working pressures and wind speeds by wind tunnel experiments. AI nozzle showed low drift potential with larger droplet sizescompared to XR nozzle. Airborne and deposition drifts of XR nozzle were two times higher than those of AI nozzle under high wind speeds(≥2 m s-1). In all cases, higher working pressures decreased the droplet sizes, thereby increasing the airborne and deposition drifts. Higher wind speedsalso resulted in more airborne drifts, while ground deposition was increased under lower wind speeds. These effects of working pressures and windspeeds on the airborne and deposition drifts were observed at leeward distances less than 4 m from the nozzles. However, the airborne and depositiondrifts were barely affected by the working pressures and wind speeds at leeward distances more than 11 m. The measurements were fitted to regressionmodels of the drift curve with acceptable R2 values greater than 0.8, demonstrating that further studies will be useful to settle domestic issues of spraydrifts.
Abstract
With rising concerns about pesticide spray drifts, this study analyzed the drift patterns of two typically-used nozzles, XR nozzle and AI nozzle,concerning their working pressures and wind speeds by wind tunnel experiments. AI nozzle showed low drift potential with larger droplet sizescompared to XR nozzle. Airborne and deposition drifts of XR nozzle were two times higher than those of AI nozzle under high wind speeds(≥2 m s-1). In all cases, higher working pressures decreased the droplet sizes, thereby increasing the airborne and deposition drifts. Higher wind speedsalso resulted in more airborne drifts, while ground deposition was increased under lower wind speeds. These effects of working pressures and windspeeds on the airborne and deposition drifts were observed at leeward distances less than 4 m from the nozzles. However, the airborne and depositiondrifts were barely affected by the working pressures and wind speeds at leeward distances more than 11 m. The measurements were fitted to regressionmodels of the drift curve with acceptable R2 values greater than 0.8, demonstrating that further studies will be useful to settle domestic issues of spraydrifts.
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