摘要
为了掌握风送式喷雾抑尘装置的喷雾特性,以JJPW-G100型风送式喷雾抑尘装置为原型建立物理模型,并采用Fluent软件对该装置的喷雾基本特性及其影响因素进行了全面考察.结果表明:当喷雾距离增大时,雾滴的平均粒径先增大后减小并渐渐趋于稳定状态;雾滴粒径和雾滴浓度均随着喷嘴安装角度的增加而增加,且45°喷嘴安装角度为喷雾降尘的最佳角度;风筒角度的增加会导致坠落中的雾滴粒径变大,风筒在20°角度下可以最大限度地扩大喷嘴的喷雾射程和降尘范围.
Abstract
To understand the spray characteristics of the air-assisted spray dust suppression device,a physical model was established based on the JJPW-G100 as the prototype.Using Fluent software,we investigated the spray field shape,range,droplet size,and wind speed of the device.Additionally,we analyzed the effects of the nozzle installation angle and the angle of the air duct on both the spray field range and droplet size.The results indicated that larger diameter droplets from the air-assisted spray dust suppression device were concentrated in the lower part of the spray field,while smaller diameter droplets were predominantly found in the upper part.Additionally,the larger droplets tended to settle near the nozzle outlet.Small droplets are dispersed in the air.As the spray distance increases,the wind speed within the effective range becomes minimal,allowing larger droplets to settle completely.Meanwhile,the concentration of fog droplets outside the effective range is relatively low.The minimum droplet size is independent of the spray range.As the spray range increases,the average droplet diameter first rises,then decreases,and eventually stabilizes.In contrast,the maximum particle size of fog droplets initially increases to a certain value before rapidly decreasing.The nozzle installation angle has a negligible effect on the minimum droplet size;however,both the size of larger droplets and droplet concentration increase as the nozzle installation angle rises.Notably,a 45° nozzle installation angle is identified as the optimal angle for spray dust reduction,resulting in an extended spray range.As the angle of the air duct increases,the height of the spray field also rises,resulting in an increase in both the average and maximum particle sizes of the droplets that fall within the effective range.The air duct can optimize the spray range and dust fall range of the nozzle when set at an angle of 20°.This configuration effectively reduces the rotation phenomenon of the spray field and demonstrates favorable results in practical engineering applications.
维普
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