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Influences of nozzle parameters and low-pressure on jet breakup and droplet characteristics

International Journal of Agricultural and Biological Engineering 2016年第4期9卷 22-32页

作者： Jiang Yue Chen Chao Li Hong Xiang Qingjiang Research Center of Fluid Machinery Engineering and Technology Jiangsu UniversityZhenjiang 212013China

Experiments were carried out to investigate the influences of nozzle geometric parameters and injection pressure on jet breakup characteristics using a high-speed photography(HSP)*** flow rates and spraying ranges of sprinkler with different nozzles were *** this research,HSP technique was also used to photograph the drops emitted by sprinkler with different nozzles at different pressures,photographs were taken at different horizontal distances from the sprinkler and the equivalent circle diameter was used to represent the particle *** on HSP technology,the effects of flow velocity and nozzle geometric parameters on jet breakup length were studied,and the droplet diameters with different nozzle types were *** result showed that for the sprinkler with different nozzles,the breakup length decreased with the increases of *** the nearby(3-9 m)region and distant(12-18 m)region of sprinkler,the droplet diameters of sprinkler with type B nozzle were the largest,which meant the sprinkler with type B nozzle was the optimal choice by synthesizing the droplet diameter *** fitting relationship of jet breakup length with Reynolds number and Weber number(Re and We),and the regression equation of the end droplet diameters were deduced with errors of less than 5%and 4%respectively.

关键词： nozzle high-speed camera jet breakup length droplet diameter fitting formula

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