论文部分内容阅读
本文根据“风对喷灌均匀度的影响”的研究,从喷洒射程、小水滴飘移最大距离、喷洒时损失的水量、喷灌强度及多喷头不同组合等方面考查的结果:有风条件下,PY_130型喷头雾化指标(H/d)为4000、工作压力为4公斤/厘米~2、嘴径为10毫米作为设计标准较适宜。一、从偏心距、变形率来看:有风条件下,喷洒水量图形为不规则的椭圆形,其变化程度系以偏心距、变形率为指标的。(所谓偏心距系指椭圆之长轴中心至喷头位置的距离;所谓变形率系指椭圆长轴与短轴之
According to the study of “the effect of wind on the evenness of sprinkler irrigation”, from the aspects of spraying range, maximum drifting distance of drip, amount of water lost during spraying, sprinkling intensity and different combinations of multiple sprinklers, Spray nozzle atomization index (H / d) 4000, the working pressure of 4 kg / cm ~ 2, mouth diameter of 10 mm as the design criteria more appropriate. First, from the eccentricity, the deformation rate of view: windy conditions, the spray pattern of water is irregular oval, the degree of change to the eccentricity, deformation rate as an indicator. (The so-called eccentricity refers to the center of the long axis of the ellipse to the position of the nozzle; the deformation rate refers to the major and minor axis of the ellipse