Authors

Abstract

In order to study the spraying effect of hydrodynamic ultrasonic atomizing nozzle under different spraying methods, and to investigate the practical application effect of hydrodynamic ultrasonic atomizing nozzle in agriculture, the atomization angle test and droplet size test under different spraying conditions were designed. Different spraying conditions atomization angle test and droplet size test were designed, the test results data were recorded, the pattern of change of the data was observed, and the data were fit to give the data changes in line with the functional equation; different spraying conditions and different corn leaf position droplet deposition coverage test were designed and the value of the deposition coverage of each position was recorded. The results showed that: the maximum value of the variation of atomization angle under different spraying conditions was 75.49°, and the minimum value was 14.49°; the maximum value of the variation of droplet size was 18.23 μm, and the minimum value was 4.78 μm; and the droplet deposition coverage was the highest in the mid-leaf position of the upper and lower leaves of the maize when the input air pressure was 0.3 MPa, which was 86.98% and 46.97%, respectively. Fitting the atomization angle data and droplet size data, the R2 of the binomial fit was 0.85 and 0.94, respectively, and the Adjusted R2 was 0.87 and 0.88, respectively, which made the fitting function meaningful and the fitting accuracy high. The hydrodynamic ultrasonic atomizing nozzle has a great advantage in generating small droplet sizes and performs well in deposition effect, and the experimental results can provide a reference for the research of hydrodynamic nozzles in the application technology.

Abstract in Chinese

为研究流体动力式超声雾化喷嘴在不同喷雾方式下喷雾效果，探究流体动力式超声雾化喷嘴在农业中实际应用效果。设计不同喷雾条件下雾化角试验和雾滴粒径试验，对试验结果数据进行记录，观测数据变化规律，并对数据进行拟合，给出符合数据变化的函数关系式；设计不同喷雾条件及不同玉米叶位置雾滴沉积覆盖率试验并对各位置的沉积覆盖率值进行记录。试验结果表明：不同喷雾条件下雾化角变化最大值为75.49°，最小值为14.49°；雾滴粒径变化最大值为18.23μm，最小值为4.78μm；在输入气压为0.3MPa时，玉米上、下叶的叶中位置雾滴沉积覆盖率最高，分别为86.98%和46.97%。对雾化角数据和雾滴粒径数据进行拟合，二项式拟合的R2分别为0.85和0.94，Adjusted R2分别为0.87和0.88，拟合函数有意义且拟合精度较高。流体动力式超声雾化喷嘴在产生小雾滴粒径有着很大优势并在沉积效果上表现优异，试验结果可为流体动力式喷嘴在施药技术方面的研究提供参考。