SIMULATION AND TEST OF A NEW COAXIAL COUNTER-ROTATING AGITATOR

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.