检索结果-南通市图书馆

Range formula based on angle of dispersion and nozzle configuration from an impact sprinkler

International Journal of Agricultural and Biological Engineering 2019年第5期12卷 97-105页

作者： Yue Jiang zakaria issaka Hong Li Pan Tang Chao Chen Research Centre of Fluid Machinery Engineering and Technology Jiangsu UniversityZhenjiang 212013China Department of Agricultural Engineering Tamale Technical UniversityNorthern RegionTamaleGhana

Jet breakup and dispersion from impact sprinkler are mainly influenced by the configurations of nozzle and dispersion *** on the structure,different types of nozzles were designed and tested with a pointed tip dispersion device under low pressure *** 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 *** 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 *** 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 *** 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.

关键词： fixed dispersion device range jet breakup angle of dispersion spray coverage impact sprinkler

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Overview of emerging technologies in sprinkler irrigation to optimize crop production

引用

International Journal of Agricultural and Biological Engineering 2019年第3期12卷 1-9页

作者： Hong Li zakaria issaka Yue Jiang Pan Tang Chao Chen Research Centre of Fluid Machinery Engineering and Technology Jiangsu UniversityZhenjiang 212013China Department of Agricultural Engineering Tamale Technical UniversityNorthern RegionTamaleGhana

Water saving is an essential part of sprinkler irrigation owing to the impact of climate change and rising energy *** review highlights the technologies that are emerging in sprinkler irrigation to optimize crop *** there have been notable advances in irrigation,the continued progress has occurred by the combination of current status with the postulation of new ideas such as conversion of high-pressure sprinkler to low-pressure ones,incorporation of smart controllers in sprinkler irrigation *** enhance the adoption of these technologies,research on the dispersion device is needed to improve the performance of impact sprinklers to efficiently operate at low-pressure *** is also important to study how water savings estimates based on water use,irrigated area,longevity of saving,and level of wasteful irrigation prior to the retrofit obtained from field trials can be extrapolated to other areas with different *** in the development of optimized method for irrigation scheduling is *** review emphasizes that the status of technologies should be considered a continuum,building on earlier knowledge and progress,and hopefully leading toward optimized crop production in sprinkler irrigated areas.

关键词： sprinkler irrigation technologies smart controllers crop water demand crop production

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Hydraulic performance characteristics of impact sprinkler with a fixed water dispersion device

引用

International Journal of Agricultural and Biological Engineering 2018年第6期11卷 104-112页

作者： zakaria issaka Hong Li Yue Jiang Pan Tang Chao Chen Ransford Opoku Darko Research Center of Fluid Machinery Engineering&Technology Jiangsu UniversityZhenjiang 212013JiangsuChina Department of Agricultural Engineering Tamale Technical UniversityNorthern RegionGhana Department of Agricultural Engineering University of Cape CoastCentral RegionGhana

One way to adapt to the trend towards low-energy and to improve the hydraulic performance of the impact sprinkler under a low pressure condition is by means of a fixed water dispersion device.A fixed dispersion device disperses jet flow from the nozzle *** shape of the tip,impact angle(θ),diameter(D),and depth in the jet flow(d)have significant influence on the hydraulic *** this study,the hydraulic performance characteristics of impact sprinkler as affected by the fixed water dispersion device were studied under indoor *** water distributions from the sprinkler were obtained by experiments for the fixed water dispersion *** was used to transform the radial data into net data,and the uniformities were simulated in a square layout from 1 to 2 times the range(R).The droplet size distributions from the fixed water dispersion devices were measured by a laser precipitation monitor(LPM).Results showed that the range increased with the increase of pressure,and the sprinkler with type C_(2) produced a rectangular-shaped water distribution pattern,while the range was maintained.A maximum uniformity of 71.56%,75.56%,77.23%,73.32%,78.88%and 86.67%was found for types A1,B1,C1,A2,B2,and C_(2),respectively under a pressure of 200 *** uniformity from the sprinkler using type C_(2) surpassed 80%,while type C1 fell *** sizes from type C_(2) was best,and the mean droplet diameter decreased with the increase of ***,type C_(2) can be selected for further optimization of the design features to improve the hydraulic performance of the impact sprinkler under low pressure conditions.

关键词： fixed water dispersion device impact sprinkler range water distribution uniformity droplet size

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：