Optimization of Key Hydraulic Structure Parameters of a New Type of Water–Pesticide Integrated Sprinkler Based on Response Surface Experiment

To meet the requirements of trellis grape crop root irrigation, spraying pesticides on branches and leaves, an integrated sprinkler was designed, which relies flow pressure to change irrigation water spray pesticide working modes. The structural parameters that affect hydraulic performance were selected based principle sprinkler. key for mode included diversion hole inclination angle, refractive cone length, distance. chute width, number chutes, rotary acceleration chamber height, nozzle outlet cylindrical section length. central composite design response surface tests water–pesticide carried out; analysis variance regression selected; main influence rules interactions system obtained. optimal were: angle is 20.8°, 123.7°, length 8.8 mm, distance 3.6 width 2.5 chutes 2, 10°, height 1.3 0.7 mm. wetted radius 3.4 m, average application rate 0.65 mm/h, uniformity coefficient 88%. droplet volume mid-diameter 200.2 μm, spectrum 2.2, coverage 9.4%.