XU Hong 1, GONG Shi-hong 1, LIU Xing-an 2, QI Ying 1
(1. China Institude of Water Resource and Hydropower Research, Beijing 100038, China; 2. China Harbor Engineering Company Ltd., Beijing 100027, China)

Abstract: The ZY-1 (5.5mm x 3.1mm), ZY-2 (7.0mm x 3.1mm) sprinkler with double-nozzle are taken as the research objects to simulate separately the flight path trajectory of droplets, and then the indoor experiment data of trajectory are compared with the simulation results. It is found that the simulated and observed values for 1.0-2.0mm droplets are in good agreement. But, for the large-diameter droplets the simulation is still quite different from the observed values. The wind velocity, nozzle working pressure, flow rate coefficient, installation height, angle of nozzle and air temperature are selected as the main factors to carryout the sensitivity analysis. The results show that the flow rate coefficient is the most influential factor, followed by the pressure of work, wind velocity, and then spray nozzle installation height and angle of nozzle, the minimum is the air temperature.

Key words: double-nozzle impact sprinkler; droplet; mathematical model; sensitivity analysis

Published in: Journal of Hydraulic Engineering, Vol. 43, No. 4, 2012