Test and analysis of droplet uniformity for pipeline constant pressure spray in orchards

Droplet uniformity is one of the key measures of spray effect，and it is important to study the influences of pressure and pore diameter on droplet uniformity of hollow cone nozzle in pipeline constant spray.Two important aspects were researched with spray performance by test platform and laser particle analyzer，five parameters of droplet uniformity under three types of pore diameter and eight types of pressure were mearsured to get the cumulative distribution of droplet，and analyze the distribution and uniformity. The results showed that，under the testing pressure（ 0.70-1.40 MPa），droplet diameter was consistent and droplet was uniform. When the pressure