不同喉管结构对文丘里施肥器性能影响的研究

发布时间：2018-07-04 20:59

本文选题：文丘里施肥器 + 吸肥性能　；参考：《节水灌溉》2017年09期

【摘要】：文丘里施肥器是常见的施肥装置,其结构流道改进成为提高施肥性能的关键因素。测试分析了圆柱形(C)、锥形(T)、椭圆形(E)等3种文丘里施肥器喉管结构、14种样品的水力学性能,结果表明:随着入口流量的增加,吸肥效率呈递减趋势;随着喉管进口直径的增大,吸肥效率的递减趋势变缓;喉管进口直径越小,随着流量的增加,其吸肥效率下降越迅速。在入口流量一定时,随着λ的增加,喉管吸肥效率呈现先增加后递减的趋势。最后计算出当λ=1.27时喉管的吸肥效率最大。在相同的入口流量下,T型喉管的吸肥能力要优于C型和E型喉管,但能量损失很大。
[Abstract]:Venturi fertiliser is a common fertilization device, and the improvement of its structure channel becomes the key factor to improve the fertilization performance. The hydraulic properties of 14 kinds of Venturi fertilizer pipe structures were tested and analyzed. The results showed that the absorption efficiency decreased with the increase of inlet flow rate, and increased with the increase of throat inlet diameter. The decreasing trend of fertilizer absorption efficiency was slower, and the smaller the throat inlet diameter was, the faster the fertilizer absorption efficiency decreased with the increase of flow rate. With the increase of 位, the absorption efficiency of larynx increased first and then decreased when the inlet flow rate was constant. Finally, when 位 = 1.27, the absorption efficiency of larynx is the highest. At the same inlet flow rate, the absorption capacity of T pipe is better than that of C type and E type larynx, but the energy loss is very large.
【作者单位】：石河子大学水利建筑工程学院;中国水利水电科学研究院;
【基金】：大型灌区节水技术集成与示范项目(2015BAD20B00) 水肥一体化的高效节水灌溉系统研究与示范项目(D151100004115002) 国家重点研发计划项目(2016YFC0403101)
【分类号】：S224.2

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