Abstract:A new kind of sprinkler—double-nozzle jet sprinkler was developed. And its structure and working principle were introduced. First of all, the numerical simulation of jet sprinkler, whose nominal diameter of inlet is 10 mm was conducted. The working mechanism of the jet sprinkler was analyzed by studying the internal flow under macro and micro conditions, which mainly includes the flow state of the pressure flow in the control pipe and the transformation process of the low-pressure eddy current in the jet space. The radius of double-nozzle jet sprinkler was studied, and under the condition of 0.05-0.25 MPa, the combined spray irrigation was carried out with nozzles of 6.0,4.0,2.5,1.5 mm. The results show that the radius of double-nozzle jet sprinkler was from 6 m to 16 m, the furthest radius is the jet sprinkler with 4.0 mm×2.5 mm nozzle diameter and the nearest radius is the jet sprinkler with 6.0 mm×6.0 mm nozzle diameter, followed by the jet sprinkler with 2.5 mm×1.5 mm nozzle diameter. The sprinkler radius can meet the requirement of sprinkler irrigation.
[1]袁寿其, 李红, 王新坤. 中国节水灌溉装备发展现状、问题、趋势与建议[J]. 排灌机械工程学报, 2015, 33(1): 78-92. [6]王娟, 马英杰, 洪明, 等. 调亏灌溉对滴灌红枣生长与品质的影响[J]. 灌溉排水学报, 2014(3):126-129. WANG Juan, MA Yingjie, HONG Ming, et al. The Effects of regulated deficit irrigation on drip irrigation red jujub growth and quality[J]. Journal of irrigation and drainage, 2014(3):126-129.(in Chinese)[7]WU Y, ZHAO Z, WANG W, et al. Yield and growth of mature pear trees under water deficit during slow fruit growth stages in sparse planting orchard[J]. Scientia horticulturae, 2013,164:189-195.[8]胡永翔, 李援农, 张莹, 等. 调亏灌溉对黄土高原地区枣树生长与果实品质和产量的影响[J]. 西北农林科技大学学报(自然科学版), 2016(6):181-188. HU Yongxiang, LI Yuannong, ZHANG Ying, et al. Effect of regulated deficit irrigation on growth, fruit quality and yield of jujubes in the Loess Plateau[J]. Journal of Northwest A&F University(natural science edition), 2016(6):181-188.(in Chinese)[9]白麟, 李援农, 曹瑞芳. 亏水灌溉对开花坐果期梨枣树生长的影响[J]. 干旱地区农业研究, 2012(2):84-87. BAI Lin, LI Yuannong, CAO Ruifang.Effcets of deficit irrigation on growth of pear-jujube tree in flowering to fruit-setting stage[J]. Agricultural research in the arid areas, 2012(2):84-87.(in Chinese)[10]郑捷, 周世峰, 吴涤非. 节水灌溉条件下作物的经济效益分析[J]. 排灌机械, 2005(3):39-41. ZHEN Jie, WU Shifeng, WU Difei. Economics benefit analysis of the crop under the condition of water saving irrigation[D]. Irrigation and drainage machinery, 2005(3):39-41.(in Chinese)