Range formula based on angle of dispersion and nozzle configuration from an impact sprinkler
作者机构：Research Centre of Fluid Machinery Engineering and TechnologyJiangsu UniversityZhenjiang 212013China Department of Agricultural EngineeringTamale Technical UniversityNorthern RegionTamaleGhana
出 版 物：《International Journal of Agricultural and Biological Engineering》 (国际农业与生物工程学报（英文）)
年 卷 期：2019年第12卷第5期
页 面：97-105页
核心收录：
学科分类：0710[理学-生物学] 0810[工学-信息与通信工程] 08[工学] 080103[工学-流体力学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0801[工学-力学（可授工学、理学学位）] 0812[工学-计算机科学与技术（可授工学、理学学位）]
基 金：supported by the National Natural Science Foundation of China(No.51679109,51809119) the Natural Science Foundation of Jiangsu Province(BK20170555) the Natural Science Foundation of the Higher Education Institutions of Jiangsu Province(17KJB470001) Special Fund for Ago-scientific Research in the Public Interest of China(201503130).
主 题：fixed dispersion device range jet breakup angle of dispersion spray coverage impact sprinkler
摘 要：Jet breakup and dispersion from impact sprinkler are mainly influenced by the configurations of nozzle and dispersion device.Based on the structure,different types of nozzles were designed and tested with a pointed tip dispersion device under low pressure conditions.Experiments were performed using High-Speed Photographic technique,and Matlab computation program was established and applied to determine the initial jet breakup length and angle of dispersion from the nozzles.The sprinkler range decreased with the increase in diameter of nozzle,and the largest range of 15.1 m was produced from sprinkler with 6 mm nozzle size under a pressure of 150 kPa.The angle of dispersion decreased with the increase of jet velocity,the spray coverage from sprinkler with 6 mm nozzle size was 1478 mm under 150 kPa,and was not statistically different when the pressure was increased.A new range formula was established for sprinkler with dispersion device through curve fitting of the parameters of initial jet breakup length,angle of dispersion,nozzle size and working pressure.The new formula was reliable for calculating range with a relative error less than 3%.Since the formula is based on the angle of dispersion,it could be useful to estimate uniformity of water distribution in sprinkler irrigated fields.
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