## 3 Results
### Analysis of the Test Results of the Deposition of the Teviet 80-03 Nozzle  
The deposition and its trend on each collection line are shown in Figure 5. It can be clearly seen from Figure 5 that the overall trend is that the drift amount is the highest at the position closest to the nozzle in the horizontal direction, and the drift amount in the vertical direction gradually decreases with the increase in height.  
Figure 5: Deposition distribution under different spray conditions. (**a**) Distribution of deposition in the horizontal direction under different spray conditions. (**b**) Distribution of vertical deposition under different spray conditions.  
The amount and distribution of droplet deposition is shown in Table 3. First, we studied the influence of the spray pressure on droplet deposition. Under the same spraying medium, in the horizontal spray direction, 2-7 m away from the nozzle, the pressure increases, and the deposition also increases. Because the pressure increases, the proportion of small droplets (\(\Phi_{Vol<150\ \mathrm{\mu m}}\)) increases. These smaller droplets are more easily carried by the airflow and deposited at a longer distance; in the vertical spray direction, the deposition is the largest at a distance of 0.1-0.2 m from the ground and is proportional to the pressure. When the distance from the ground is \(\geq\)0.3 m, the deposition decreases sharply until there is no deposition at all. The main reason is that as the pressure increases, the flow rate of the nozzle and the number of small droplets (\(\Phi_{Vol<150\ \mathrm{\mu m}}\)) increase significantly, the initial velocity of the droplets at the nozzle outlet also increases, the crosswind has a reduced impact on the high-speed small droplets, and the high-speed droplets can settle quickly compared to low-speed droplets. This results in the high-speed small droplets becoming mostly deposited near the nozzle in the horizontal direction, and most of them are deposited near the bottom of the wind tunnel in the vertical direction, but the low-speed droplets will drift to a far distance under the influence of crosswinds before they begin to deposit.  
Secondly, we studied the influence of the spraying medium on deposition. Under the same pressure, in the horizontal spray direction, the deposition of spraying clear water at a distance of 2-7 m from the nozzle is greater than that of the PEG-20,000 solution at different concentrations, and as the concentration of the PEG-20,000 solution increases, the overall deposition shows a decreasing trend. This is mainly because as the concentration of PEG-20,000 solution increases, the droplet size increases and the proportion of small droplets (\(\Phi_{Vol<150\ \mathrm{\mu m}}\)) decreases, therefore, both the probability of the droplet drift and the distance of the droplet drift reduced; in the vertical spray direction, when spraying clear water at a distance of 0.1-0.2 m from the bottom of the wind tunnel, the deposition is greater than that of PEG-20,000 solution at different concentrations, and with the increase of the concentration of PEG-20,000 solution, the deposition gradually decreases; when the distance from the bottom of the wind tunnel is \(\geq\)0.3 m, the vertical deposition of spraying clear water is less than that of spraying PEG-20,000, and as the concentration of the solution increases, the deposition gradually increases. It can be seen that the addition of PEG-20,000 can effectively reduce the droplet loss at horizontal distance and low altitude.  
\begin{table}
\begin{tabular}{c c c c c c c c c c} \hline \hline \multirow{2}{*}{
\begin{tabular}{c} **Spraying** \\ **Medium** \\ \end{tabular} } & \multirow{2}{*}{**Pressure/MPa**} & \multicolumn{8}{c}{**Depposit Results(\(\mu\)L-1\({}^{-1}\))**} \\ \cline{3-10}  & & & & & & & **\(H_{2}\)** & \(H_{3}\)** & \(H_{4}\)** & \(H_{5}\)** & \(H_{6}\)** \\ \hline \multirow{4}{*}{1} & 0.2 & 0.00