Structure optimization and fertilizer injection performance analysis of a non-axisymmetric Venturi injector

IF 1.6 4区农林科学 Q2 AGRONOMY

Irrigation and Drainage Pub Date : 2023-08-30 DOI:10.1002/ird.2881

Guirong Hu, Xin Guan, Shiying Li, Ningning Liu, Jihong Zhang, Prasad Dhital Yam, Jinzhu Zhang, Zhenhua Wang

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Abstract

To improve the fertilizer injection performance of a non-axisymmetric Venturi injector (NAVI), the effects of the contraction angle, diffusion angle, throat diameter and tilt angle of the injection pipe on the fertilizer injection performance of NAVI were examined. Based on the test, the original NAVI was optimized, and the fertilizer injection performance of NAVI before (F1) and after (F2) optimization was compared. Then, a non-axisymmetric Venturi injector with arc diffusion (F3) was proposed. The results showed that when the water inlet diameter of the non-axisymmetric Venturi injector was 25 mm, the optimal structural parameters were as follows: the contraction angle was 40°, the diffusion angle 6°, the throat diameter 7 mm and the tilt angle of the injection pipe was 120°. Compared with F1, the injection rate and fertilizer injection efficiency of F2 increased by 21–66 and 27–79%, respectively. Changing the diffusion section of NAVI into an arc structure was conducive to reducing the vortex area size by 11% and improving the injection rate by 20–62%. The results can provide an important reference for the structural design of Venturi injectors.

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非轴对称文丘里喷射器结构优化及施肥性能分析

为了改善非轴对称文丘里注射器（NAVI）的施肥性能，研究了注射管的收缩角、扩散角、喉部直径和倾斜角对NAVI施肥性能的影响。在试验的基础上，对原NAVI进行了优化，并对优化前（F1）和优化后（F2）NAVI的施肥性能进行了比较。然后，提出了一种具有电弧扩散（F3）的非轴对称文丘里喷嘴。结果表明，当非轴对称文丘里喷嘴的进水直径为25 mm，最佳结构参数为：收缩角为40°，扩散角为6°，喉部直径为7mm，注入管倾斜角为120°。与F1相比，F2的施肥量和施肥效率分别提高了21-66和27-79%。将NAVI的扩散截面改为弧形结构有利于将涡流面积减小11%，并将注入率提高20–62%。研究结果可为文丘里喷射器的结构设计提供重要参考。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Irrigation and Drainage 农林科学-农艺学

CiteScore

3.40

自引率

10.50%

发文量

107

审稿时长

3 months

期刊介绍： Human intervention in the control of water for sustainable agricultural development involves the application of technology and management approaches to: (i) provide the appropriate quantities of water when it is needed by the crops, (ii) prevent salinisation and water-logging of the root zone, (iii) protect land from flooding, and (iv) maximise the beneficial use of water by appropriate allocation, conservation and reuse. All this has to be achieved within a framework of economic, social and environmental constraints. The Journal, therefore, covers a wide range of subjects, advancement in which, through high quality papers in the Journal, will make a significant contribution to the enormous task of satisfying the needs of the world’s ever-increasing population. The Journal also publishes book reviews.