Simulation of water spraying lateral distribution in synchronously controlled moving linearmove irrigators
YUAN Yan-Wei, ZHANG Xiao-Chao, WU Cai-Cong, FAN Yun-Tao
(1. State Key Lab of Soil Plant Machinery System Technology, Chinese Academy of Agricultural Mechanization Sciences, Beijing 100083, China; 2.Institute of Remote Sensing and GIS, Peking University, Beijing 100871, China)
Abstract：Rainfall distribution and water trajectory information was acquired through a single nozzle indoor test. A threedimensional model of water motion was built by using the virtual reality technology, such as threedimensional modeling and particle system etc. The optimal driving speed was realized by studying the uniformity of water distribution across the lateral direction when a linear move irrigator is being moved ahead.The configuration of sprinklers was optimized by analyzed effects of the distance between adjacent two sprinklers and the height of sprinklers on the uniformity of lateral distribution of water. According to the water distributions measured by employing a single sprinkler, a water distribution model was built for a linear move irrigator.Field tests and simulation results showed that a variable vertical irrigation could be got by changing the frequency of the motors, while the uniformity of irrigation in the lateral direction depended on the type and pressure of sprinkler. The maximum relative error between field test and simulation is 339％, suggesting the simulation model is reliable. This outcome provides a means of investigating effect of irrigation and parameter optimization for a linear move irrigator.
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