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首页> 外文期刊>Agricultural mechanization in Asia, Africa and Latin America >Spray Droplet Number and Volume Distribution as Affected by Pressure and Forward Speed
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Spray Droplet Number and Volume Distribution as Affected by Pressure and Forward Speed

机译：受压力和前进速度影响的液滴数目和体积分布

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摘要

The influence of spray application pressure and forward speed on droplet number and volume distribution was studied. Treatments included pressures of 4 and 2 bars and forward speeds of 5.4 km/hr, 7.9 km/hr and 10.8 km/hr. All treatments were applied by one nozzle size at one rate of spray application.rnWhen pressure was increased from 2 bars to 4 bars, the average droplet density per square centimeter was increased by 52 %. Increasing the forward speed from 5.4 km/ hr to 7.9 km/hr increased the droplet density/cm2 by 18.28 %. Further increase in speed to 10.8 km/hr increased the droplet density by 38.2 %. Statistical analysis showed highly significant difference at the 1 % level between the effects of pressure and speed on droplet density.rnThe lower pressure (2 bars) with the highest forward speed (10.8 km/ hr) resulted in the highest percentage (39 %) of droplet size (30-100 um) which was in favour of controlling insects. For all levels of speed, higher pressure showed the highest uniformity of distribution of spray droplets and lower volume median diameter (VMD) and number median diameter (NMD) values. The smallest ratio of VMD/NMD (1.77)rnwith narrow droplet spectrum was recorded at higher pressure (4 bars) and a forward speed of (7.9 Km/hr).
机译：研究了喷涂压力和前进速度对液滴数量和体积分布的影响。处理包括4巴和2巴的压力以及5.4 km / hr，7.9 km / hr和10.8 km / hr的前进速度。所有处理均以一种喷嘴大小以一种喷涂速率进行。rn当压力从2巴增加到4巴时，每平方厘米的平均液滴密度增加52％。将前进速度从5.4 km / hr增加到7.9 km / hr，可使液滴密度/ cm2增加18.28％。进一步提高速度至10.8 km / hr，液滴密度增加了38.2％。统计分析表明，压力和速度对液滴密度的影响在1％的水平上存在显着差异.rn较低的压力（2 bar）和最高的前进速度（10.8 km / hr）导致最高的百分比（39％）液滴尺寸（30-100微米），有利于控制昆虫。对于所有水平的速度，较高的压力显示出最高的喷雾分布均匀性，而较低的体积中值直径（VMD）和数量中值直径（NMD）值。在较高的压力（4巴）和正向速度（7.9 Km / hr）下记录到具有窄液滴光谱的最小VMD / NMD比（1.77）。

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