不同喉管结构对文丘里施肥器性能影响的研究  

Experimental Study on the Effect of Different Throat Structure Types on Venturi Injector Performance

作　　者：谢冬辉 吴文勇[2] 王振华[1] 廖人宽[2] 

机构地区：[1]石河子大学水利建筑工程学院,新疆石河子832000 [2]中国水利水电科学研究院,北京100048

出　　处：《节水灌溉》2017年第9期5-9,共5页Water Saving Irrigation

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)

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。Venturi injector is a common fertilization device. The flow channel structure is the key factor to improve the fertilization performance. In this paper, the hydraulics performance of three kinds of throat structure for Venturi injector, including conical type （C）, cylindrical type （T）, elliptic type （E）, and 14 kinds of samples are test and analyzed. The results show that： with the increase of the inlet flowing rate, the fertilization efficiency has a descending trend; with the increase of inlet diameter of throat, the descending trend of fertilization efficiency becomes slow gradually; the smaller the diameter of throat, the more rapidly the fertilization efficiency decreases with the increase of the flowing rate; Under the same inlet flow rate, with the increase of A value, the fertilization efficiency of throat increases first and then decreases. ; the calculated value of fertilization efficiency of throat is the largest when A equals 1.27. Under the same inlet flow rate, the fertilizer absorption ability of T type throat is better than that of C and E type, but the energy loss is large.

关 键 词：文丘里施肥器 吸肥性能 喉管结构 吸肥效率 

分 类 号：S224.2[农业科学—农业机械化工程]