| Cite this article: | 朱兴业,史永杰,胡广,等.旋转驱动射流喷头水量分布动态仿真及试验[J].灌溉排水学报,0,():-. |
| Zhu Xingye,Shi Yongjie,Hu Guang,et al.旋转驱动射流喷头水量分布动态仿真及试验[J].灌溉排水学报,0,():-. |
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| Dynamic Simulation and Test of Water Distribution of Roto-Driven Fluidic Sprinkler |
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Zhu Xingye1, Shi Yongjie2, Hu Guang2, Liu Junping2
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1.Farmland Irrigation Research Institute, CAAS/ Key Laboratory of Water-Saving Agriculture of Henan Province;2.Research Center of Fluid Machinery Engineering and Technology
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| Abstract: |
| Water saving is an essential part of sprinkler irrigation due the rising energy costs and impact of climate change. Therefore, the aim of this paper was to study the influence of nozzle spacing, combination mode and rotation speed on two evaluation indexes of rotary drive jet nozzle and multi-nozzle. MATLAB R2014a software was employed to establish the computational program for coefficient of uniformity (CU) and distribution uniformity coefficient (DU). Results showed that there were variations of sprinkler irrigation intensity, water volume distribution and coefficient of variation of the nozzle under different working pressures and different installation heights. The regression relationship between the peak water intensity and the working pressure was established, and the spatial water distribution of the nozzle under single nozzle, square and triangle combined sprinkler irrigation was simulated. The result indicated that, the developed simulation MATLAB code can better reflect the non-uniformity of the rotation of the nozzle during the full-circle spraying process. At a height of 1.5, 1.1 and 1.3m, the peak intensity of 5, 8.9 and 10.5mmh-1 were recorded at an operating pressure of 100kPa, respectively. The standard deviations of DU and CU for single nozzle under different working pressures were 15.5 and 9.3%, respectively. In the actual sprinkler irrigation project, the spacing of the square combination sprinkler irrigation should be less than 8m, and the spacing between the triangular combination nozzles should be arranged around 8m.The newly designed sprinkler has practical significance to improve the application efficiency and save water for crop production in the sprinkler irrigated fields. |
| Key words: Roto-Driven;Fluidic Sprinkler;Meshing rotation;deviation Dynamic;simulation Hydraulic;performance |
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