Abstract：Based on the structure of the 20PY2 impact sprinkler,the principle of gas-liquid two-phase jet spray was applied to procedure a 20PY2 aeration impact sprinkler. At the low pressure, the combination irrigation effect of 20PY2 aeration impact sprinkler was studied and compared with 20PY2 impact sprinkler. The evaluation index was included the average irrigation intensity, evaporation drift values, combination uniformity coefficient and distribution uniformity coefficient. Meanwhile, the variable was included work pressure and combination distance. The experiment results show that: compared with the impact sprinkler, the range of the aeration impact sprinkler has little change, but the average sprinkler intensity of the aeration impact sprinkler increases with the increase of working pressure and decreases with the increase of combined distance. At the low pressure, the evaporation and drift value of aeration impact sprinkler at the wind speed of 1m/s is about 5%,and the optimal working pressure and the combination distance of its combination irrigation are 300 kPa and 1.1R, respectively. Aeration impact sprinkler have a better gradient between the peak and valley values of irrigation intensity. The average value of the peak interval and valley interval of the same number of measurement points tends to be the average irrigation intensity. The proportion of the peak interval and valley interval in the total irrigation intensity is lower and higher than that of the impact sprinkler. Therefore, the sprinkling irrigation effect of aeration sprinkler is superior to that of impact sprinklers.
