Numerical Experiment and Optimized Design of Pipeline Spraying On-Line Pesticide Mixing Apparatus Based on CFD Orthogonal Experiment

Pipeline spraying can be adopted for greatly improving efficiency in hillside orchard operations. However, residual phytosanitary product still remains the pipeline after completion of Currently, liquid is handled according to following general method: flushing with fresh water. The method easily lead pesticide waste and environment pollution. On-line mixing technology reducing environmental on-line not applied Therefore, principle jet-mixing apparatus as a reference paper designing basic structure based on spraying. mainly composed constricted tube, suction chamber, Venturi, diffusion tube. An analysis CFD orthogonal experiment studying influence changes four key parameters apparatus, dissolution performance, performance; include tube falloff angle, divergence Venturi diameter, length. Since there may interaction among them, three evaluation indexes lifting height, turbulent kinetic energy, pressure recovery distance are set judgment. change length, respectively, revealed through single-index variance analysis; distance. primary secondary sequences respective influences all their obtained. Analysis results comprehensively considered order finally discover comprehensive optimal parameters, namely: angle 22°, 9°, diameter 2 mm, length 6 optimized. Theoretical provided prototype production basis