| 引用本文: | 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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| 摘要: |
| 为研究工作压力,喷头组合间距、组合方式和旋转速度对旋转驱动射流喷头及多喷头组合喷灌均匀性系数(CU)和分布均匀系数(DU)两个评价指标的影响规律,本文开发出不同工作条件下单喷头和多喷头组合喷灌水量分布的动态仿真代码,对旋转驱动射流喷头开展了水力性能试验；研究了旋转驱动射流喷头在不同工作压力及安装高度条件下对喷灌强度、水量分布的影响规律；建立了水量峰值强度与工作压力的回归关系式；模拟了单喷头、正方形和三角形组合喷灌下的空间水量分布。研究结果表明喷头在1.5m安装高度、100—300kPa压力条件下,水量峰值集中在5 mmh-1附近,标准偏差(STD)为0.23。喷头在100kPa工作压力,安装高度为1.1m、1.3m的水量峰值强度分别可高达8.9mmh-1、10.5mmh-1。不同工作压力下的单喷头喷灌的DU和CU标准偏差分别为15.5%、9.3%,且DU对压力的变化相对更为敏感。在实际喷灌工程中正方形组合喷灌的间距应小于8m,三角形组合喷头之间的间距应布置在8m附近,为新型结构喷头的应用提供了理论基础。 |
| 关键词: 旋转驱动射流喷头；网格化；转动均匀性；动态仿真；水力性能 |
| DOI： |
| 分类号:S277.9 |
| 基金项目:江苏省重点研发计划（现代农业）BE2018313，河南省节水农业重点实验室开放基金FIRI2016-21 |
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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 |
