A two-directional calculation model for the combination uniformity coefficient of an impact sprinkler. (February 2022)

• Record Type: Journal Article
• Authors: Xu, Zhengdian; Li, Hong; Xiang, Qingjiang; Chen, Cao; Jiang, Yue; Tang, Pan
• Is Part Of: Advances in mechanical engineering. Volume 14:Number 2(2022)
• Publication Date: 2022-02
• Subjects: Combination uniformity coefficient -- model -- sprinkler speed -- application depth -- nozzle -- speed combination; Mechanical engineering -- Periodicals; 621.05
• DOI: 10.1177/16878132221081590
• Languages: English
• ISSNs: 1687-8132

Abstract

An impact sprinkler loaded on a remote control trailer can be used for motion to improve the efficiency of a single Hard Hose Traveler in small and medium-sized irregular fields. Herein, a model for calculating the combination uniformity coefficient (CU) was established in the square test area under two-directional motion. The accuracy of the irrigation uniformity model was verified using the test data of application depth ( hn ). The results revealed that the nozzle diameter, speed of sprinkler motion ( v ), and motion methods can significantly impact the average application depth (h − ) and the CU value of sprinkler irrigation performance. The motion methods included uniform motion and a constant speed combination motion. The highest CU values were recorded when the primary and secondary nozzle diameters were 10.5 and 4.5 mm, respectively (overall value, about 81.7%). The CU value gradually decreased with the increasing v value of the sprinkler. The CU value was higher under the constant speed combination motion than the uniform motion. Theh ¯ value gradually decreased with increasing v value. Theh ¯ value was classified based on the water requirement of different crops. The optimal CU value corresponding to each grade of theh ¯ value was obtained in different schemes of the combination of sprinkler speeds. This research guides the realization of variable spraying of a Hard Hose Traveler and the intelligent uniform motion of the sprinklers.