| Cite this article: | 胡贵荣,李诗莹,金嫣婧,等.扩散段位置对非对称文丘里施肥器吸肥性能及水力性能的影响[J].灌溉排水学报,0,():-. |
| Hu Guirong,LI Shiying,Jin Yanjing,et al.扩散段位置对非对称文丘里施肥器吸肥性能及水力性能的影响[J].灌溉排水学报,0,():-. |
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| Effects of Diffusion Section Position on Fertilizer Absorption Performance and Hydraulic Performance of Non-asymmetric Venturi Injector |
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Hu Guirong1,2, LI Shiying1,3,3,2, Jin Yanjing1,2, Cao Yuan1,2, Wang Zhenhua1,2, Liu Ningning1,2
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1.College of Water Conservancy &2.Architectural Engineering, Shihezi University;3.amp
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| Abstract: |
| 【Objective】In order to improve the fertilizer absorption performance of asymmetric Venturi injector, the response of fertilizer absorption performance and hydraulic performance to the position of diffusion section was explored.【Method】Five kinds of non-asymmetric Venturi injectors with different diffusion sections were designed, and their fertilizer absorption performance test and numerical simulation were carried out respectively. The fertilizer absorption flow, critical fertilizer absorption pressure difference and critical fertilizer absorption pressure at inlet were compared and analyzed.【Results】In the normal working stage of non-asymmetric Venturi injector, the fertilizer absorption flow showed a good linear relationship with the inlet pressure. When the inlet and outlet pressure difference was about 0.15 MPa, the fertilizer absorption flow reached the maximum. The critical pressure difference and inlet critical pressure increase with the increase of outlet pressure. Compared with the original of non-asymmetric Venturi injector (F1), the fertilizer absorption flow and efficiency of non-asymmetric Venturi injector with eccentric downward diffusion section (F5) were increased by 13.03%?40.16% and 12.09%?39.13%, respectively. With the increase of inlet pressure, the increase gradually decreased. Compared with F1, The maximum fertilizer absorption flow of F5 increased by 13.03%, and the critical pressure difference of F5 decreased by 7.69%.【Conclusion】When working normally, reducing the outlet pressure is beneficial to reduce the critical pressure of fertilizer absorption. Moving the diffusion section away from the side of the fertilizer suction pipe is conducive to reducing the local head loss, improving the negative pressure utilization efficiency of the throat, increasing the flow rate of fertilizer suction under extreme conditions, reducing the critical pressure difference of fertilizer absorption, and improving the overall working performance of Venturi injector. The study can provide theoretical reference for the development of new Venturi injector. |
| Key words: Venturi injector; Diffusion structure; Fertilizer absorption performance; Fertilizer absorption flow |
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