| 安装高度和工作压力对育苗喷头水力性能影响的试验研究 |
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| 引用本文： | 高飞,朱德兰,闫婧歆,李佩泽,赵灵犀,邢欣,杨明飞,郑长娟,刘一川,张晓敏,张锐.安装高度和工作压力对育苗喷头水力性能影响的试验研究[J].灌溉排水学报,2022,41(1):119-125. |
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| 作者姓名： | 高飞 朱德兰 闫婧歆 李佩泽 赵灵犀 邢欣 杨明飞 郑长娟 刘一川 张晓敏 张锐 |
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| 作者单位： | 西北农林科技大学水利与建筑工程学院,陕西杨凌712100,西北农林科技大学水利与建筑工程学院,陕西杨凌712100;西北农林科技大学中国旱区节水农业研究院,陕西杨凌712100 |
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| 基金项目： | 国家自然科学基金;陕西省重点研发计划项目;国家重点研发计划;大学生创新创业训练计划项目 |
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| 摘 要： | 目的]探究安装高度及工作压力对育苗喷头水力性能的影响,得到育苗喷头适宜工作条件,优化育苗喷头喷洒水力性能.方法]选取育苗喷头的安装高度为0.5、0.6、0.7 m,分别测试其在200、250、300、350 kPa工作压力下单喷头的水量分布.基于水量平衡原理,建立移动喷洒水量分布计算模型,将单喷头定喷水量分布转换为...
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| 关 键 词： | 育苗喷头 安装高度 工作压力 组合间距 均匀系数 |
Impact of Mounting Height and Working Water Pressure on the Performance of Micro-sprinkler Irrigation System for Seedling Beds |
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| GAO Fei,ZHU Delan,YAN Jingxin,LI Peize,ZHAO Lingxi,XING Xin,YANG Mingfei,ZHENG Changjuan,LIU Yichuan,ZHANG Xiaomin,ZHANG Rui.Impact of Mounting Height and Working Water Pressure on the Performance of Micro-sprinkler Irrigation System for Seedling Beds[J].Journal of Irrigation and Drainage,2022,41(1):119-125. |
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| Authors: | GAO Fei ZHU Delan YAN Jingxin LI Peize ZHAO Lingxi XING Xin YANG Mingfei ZHENG Changjuan LIU Yichuan ZHANG Xiaomin ZHANG Rui |
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| Institution: | ,College of Water Resources and Architectural Engineering, Northwest A&F University,Institute of Water-saving Agriculture in Arid Areas of China, Northwest A&F University |
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| Abstract: | 【Objective】Micro sprinkler irrigation is often mounted on the top of seeding beds to nurture crop seedlings. The purpose of this paper is to study the impact of the mounting height and working water pressure on performance of the irrigation system.【Method】We compared three mounting heights: 0.5, 0.6 and 0.7 m, and four working water pressures: 200, 250, 300 and 350 kPa. In each treatment, we measured the spatial distribution of water droplets. Based on the mass balance, we derived a model to calculate the water distribution sprayed from the nozzle,and converted constant water distribution measured from a single sprinkler to dynamic water distribution. We also measured the uniformity coefficient of water in all treatments and linked it to water pressure and the distance between adjacent nozzles.【Result】Increasing the installation height from 0.5 to 0.7 m improved uniformity of the water distribution and reduced the maximum irrigation intensity; the average intensity of single sprinkler increased with water pressure. When the working pressure was the same, the uniformity coefficient decreased first and then increased before declining again as the distance between adjacent nozzles increased. When the installation height was the same, the uniformity coefficient of water distribution did not show noticeable change with the working water pressure. For all treatments we compared, the optimal working conditions were as follows: installation height, 0.5 m,working water pressure, 300 kPa, space between adjacent nozzles, 0.5 m. These gave a uniformity coefficient as high as 98.08%.【Conclusion】Raising the mounting height of the system increased the uniformity coefficient of water distribution and the area that the water could cover, and reduced the maximum water intensity. Increasing the working water pressure increased water irrigation intensity. For the system we studied, the optimal installation height,working water pressure and nozzle spacing were 0.5 m, 300 kPa and 0.5 m, respectively. |
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| Keywords: | seedling bed nozzle installation height working pressure combination spacing uniformity coefficient |
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