期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2012
卷号：15
期号：7
出版社：IOP Publishing
摘要：As one of the main fertilization devices, Venturi injector has been widely used in small and medium-sized pipe irrigation systems. Ho wever, the pressure loss produced by it during fertilizer injection decreases fertilization quality and irrigation uniformity. The structural optimization of the Venturi injector was carried out using orthogonal experimental design and CFD technology. An injector sample with the optimal comb ination of structural parameters and the highest injection efficiency was processed to test the performance of the injectors before and after optimization. The injection rate, the maximum injection rate, the flow ratio of the injection rate to the outlet flow rate and other performance parameters were significantly improved while the critical pressure differential wa s obviously reduced, which indicated that the range of working pressure of the injector was remarkably expanded. Additionally, the feasibility and accuracy of the structural optimization scheme were verified by the experiment
