排灌机械工程学报
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排灌机械工程学报  2018, Vol. 36 Issue (11): 1109-1114    DOI: 10.3969/j.issn.1674-8530.18.1040
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基于异形喷嘴结构的低压喷头水力性能
华琳, 蒋跃*, 李红, 周小引
江苏大学国家水泵及系统工程研究中心, 江苏 镇江 212013
Hydraulic performance of low pressure sprinkler with special-shaped nozzles
HUA Lin, JIANG Yue*, LI Hong, ZHOU Xiaoyin
National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China
 全文: PDF (2314 KB)   HTML (1 KB)   输出: BibTeX | EndNote (RIS)      背景资料
摘要 对2种流量相等的出口截面形状为正方形和正三角形的异形喷嘴与圆形喷嘴进行了对比研究,研究其压力、喷嘴锥角、出口截面形状对流量、射程、喷灌强度和喷灌均匀性等水力性能的影响.结合试验和Matlab软件,分析低压下异形喷嘴在矩形布置下的组合均匀性,确定了组合喷灌均匀性最好的喷嘴型号及其最佳组合间距.研究表明:锥角一定时,喷嘴的流量和射程均随着压力增大而增大;压力一定时,喷嘴的流量和射程随着锥角变大而减小.低压条件下,异形喷嘴的喷灌均匀性较圆形喷嘴有极大改善,低压组合喷灌均匀性最佳的喷嘴为锥角45°的正三角形喷嘴,最佳组合间距为一个有效喷洒半径.异形喷嘴的组合均匀性系数比圆形喷嘴的高,说明在组合喷灌时选用异形喷嘴更能体现喷灌均匀性优势.
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华琳
蒋跃*
李红
周小引
关键词异形喷嘴   低压   流量相等原则   水力性能   Matlab     
Abstract: According to the principle of equal flow, two sorts of special-shaped nozzles with cross-sections such as square and equilateral triangle were designed, and their hydraulic performance was compared with that of the ordinary nozzle with circular cross-section. Effects of taper angle, pressure and outlet cross-section shape on flow, range, sprinkler intensity and irrigation uniformity were examined at low pressure. By using experiment and Matlab code, the combination irrigation uniformity was analyzed, these special-shape nozzles were placed in a rectangular pattern at low pressure, and the optimum special-shaped nozzle and the best combination spacing were determined in terms of the best irrigation uniformity. The results show that the flow and range of the nozzles increase with increasing pressure at a fixed taper angle. At a constant pressure, the flow and range decrease with increasing taper angle. Under low pressure conditions, the irrigation uniformity is greatly improved in the special-shaped nozzles in comparison with the ordinary nozzle. The special-shaped nozzle with outlet cross-section of equilateral triangle and 45° taper angle is the optimum nozzle in terms of the best irrigation uniformity at low pressure, and the corresponding optimal combination space is the effective spraying radius. It can be seen that the combination uniformity coefficient of the special-shaped nozzles is much higher than that of the ordinary nozzle. This fact indicates that choosing special-shaped nozzles in combination sprinkler irrigation can even better reflect the advantage in sprinkler irrigation uniformity.
Key wordsnon-circular nozzles   low pressure   equal flow   hydraulic performance   Matlab   
收稿日期: 2018-04-24;
基金资助:

国家自然科学基金资助项目(51679109);江苏省自然科学基金资助项目(BK20170555);江苏省高等学校自然科学研究面上项目(17KJB470001);江苏高校优势学科建设工程项目(PAPD)

引用本文:   
华琳,蒋跃*,李红等. 基于异形喷嘴结构的低压喷头水力性能[J]. 排灌机械工程学报, 2018, 36(11): 1109-1114.
HUA Lin,JIANG Yue-*,LI Hong et al. Hydraulic performance of low pressure sprinkler with special-shaped nozzles[J]. Journal of Drainage and Irrigation Machinery Engin, 2018, 36(11): 1109-1114.
 
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