Abstract:
A new prototype of fluidic sprinkler (PXH) is proposed and its working theory is reported. The hydraulic performance of four
different types of sprinkler head (PXH, PY, Toro S 800 and RainBird S 3504) was compared at the same operating pressure.
Meanwhile, PXHs with nozzle diameters of 4, 6 and 8 mm were tested to establish a mathematical model of water distribution
and droplet diameter. The results show that the PXH produces the longest wetted radius, potentially due to its unique working
principles. The PXH exhibits optimal water distribution performance because the air in the nozzle destroys the fluid structure of
the water jet. The PXH results in the smallest droplet diameter, which transfers less kinetic energy to the soil. The results from
the empirical equations of a distribution model from the PXH were plotted against actual values to obtain regressions, with
coefficients of determination ranging from 95.1 to 98.8%. The droplet size model was determined by fitting the experimental
results obtained using different operating pressures and nozzle diameters. The model was verified using the experimental
results of six cases with different droplet diameters. The average relative error between the predicted and measured droplet
diameters was 4.6%.
