Authors

Abstract

Addressing the issues of water resource wastage, low fertilizer utilization efficiency, and uneven water-fertilizer mixing in current irrigation and fertilization practices, a new type of coaxial counter-rotating agitator was designed. Based on computer numerical simulation technology, this paper simulated and analysed the agitator's modes and flow field distribution, establishing the law that governed the variation of velocity distribution within the agitator's internal flow field with changes in rotational speed. An orthogonal experimental design was employed, utilizing stirring speed, stirring duration, and submerged depth as the experimental variables, and the outcomes were subsequently analysed utilizing Design-Expert software. The findings indicated that optimal fertilizer solubility was achieved when the stirring speed was 400 r/min, the stirring time was 5 minutes, and the stirring depth was 660 mm. This study provided a theoretical basis for the design and application of the coaxial counter-rotating agitator and aided in guiding parameter selection and optimization for practical applications.

Abstract in Chinese

针对目前灌溉施肥中存在的水资源浪费、肥料利用率较低以及水肥混合不均匀的问题，设计了一种新型同轴异转搅拌器.本文基于计算机数值模拟仿真技术，对搅拌器的模态、流场分布进行模拟分析，确定了搅拌器内部流场的速度分布随转速变化的规律；以搅拌转速、搅拌时间和潜液深度为试验因素设计正交试验，使用Design-Expert软件对结果进行分析，结果表明:当搅拌速度400 r/min、搅拌时间5 min、搅拌深度660 mm时，肥料溶解度最优。本研究为新型同轴异转搅拌器的设计和运用提供了理论依据，并有助于指导实际应用中的参数选择和优化。