水利学报2019，Vol.50Issue(4)：488-496,9.DOI:10.13243/j.cnki.slxb.20180660
摇臂式喷头喷嘴结构改进及水力性能试验研究
Optimization of nozzle structure and investigation on hydraulic performance of impact sprinkler
摘要
Abstract
In order to reduce the operating cost of impact sprinkler in engineering application and improve the quality of sprinkler irrigation, this paper focused on the improvement of main and secondary nozzle structure of the 8034 D impact sprinkler, and the effects of the improved nozzle structure on sprinkler flow rate, radial water distribution and the uniformity coefficient of combined sprinkler irrigation. The results showed that, conical angles of inner cavity had a significant effect on sprinkler flow rate, the larger the conical angles of inner cavity, the smaller the sprinkler flow rate. At the same working pressure, the improved secondary nozzle structure had little effect on the sprinkler flow rate. With the increasing of the horizontal distance between the measured point and the sprinkler, the radial water application rate at different conical angles of inner cavity and the cylinder lengths was decreasing. The uniformity of sprinkler irrigation of the combination 2 were better among the four combinations, the average uniformity coefficient of seven kinds of combined space in a square arrangement of sprinkler was 87.8％, and the peak of the uniformity coefficient reached 89.3％ when the sprinkler spacing was 17 m×17 m. Taking the irrigation quality and cost into account, the main and secondary nozzles of the 8034 D impact sprinkler choosing combination 2 at the sprinkler operating pressure of 250 kPa and the sprinkler spacing of 17 m×17 m.关键词
摇臂式喷头/喷嘴结构改进/喷头流量/径向水量分布/组合喷灌均匀度Key words
impact sprinkler/improvement of nozzle structure/sprinkler flow rate/radial water distribution/uniformity coefficient of combined sprinkler irrigation分类
建筑与水利引用本文复制引用
王子君,惠鑫,黎耀军,严海军..摇臂式喷头喷嘴结构改进及水力性能试验研究[J].水利学报,2019,50(4):488-496,9.基金项目
国家重点研发计划项目(2017YFD0201502) （2017YFD0201502）
国家自然科学基金项目(51621061) （51621061）
国家863计划项目(2011AA100506) （2011AA100506）
