Experimental study on hydraulic performance of negative pressure feedback sprinkler affected by driving plate inclination angle
ZHAO Wenhe1, WANG Xinkun1*, ZHANG Chenxi2, JIN Binbin3, MENG Tianshu1, WANG Xi1, SHAO Zhuang4
1. National Research Center of Pumps, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2. Central Route of South-North Water Transfer Information Technology Co., Ltd., Beijing 100176, China; 3. Tangshan Water Administration Supervision Brigade, Tangshan, Hebei 063000, China; 4. Shandong Zhongke Advanced Technology Research Institute Co., Ltd., Jinan, Shandong 250101, China
Abstract：In order to explore the different inclination angles of the driving plate of the jet pulse sprinkler and its influence on the hydraulic performance of the sprinkler, and find out the optimal inclination angle of the driving plate for hydraulic performance, six kinds of driving plates with different inclination angles α(7°, 10°, 13°, 16°, 19°, 22°)were designed by orthogonal test method, and the hydraulic performance tests were carried out under different inlet pressure. The multi-factor analysis method was used to analyze the test results of six groups of driving plates, taking sprinkler range, sprinkler irrigation uniformity and sprinkler irrigation intensity were used as evaluation indexes. The results show that under the inlet pressure of 0.15-0.30 MPa, the sprinkler range(13.0-15.0 m), and inlet flow rate(1.27-1.77 m3 /h), and sprinkler irrigation intensity(2.38-2.51 mm/h)have nothing to do with the inclination of the driving plate. With the increase of the inclination angle of the driving plate, the spraying water volume of the auxiliary sprinkler is concentrated near, and the uniformity coefficient of sprinkler irrigation increased first and then decreased; when the inclination angle of the driving plate is 16°, the uniformity coefficient of sprinkler irrigation is the largest and the hydraulic performance of the sprinkler is the best.
