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Nozzle classification system in Japan based on the relative spray ...

Nozzle classification system in Japan based on the relative spray ...

Drift Potential Index

Drift Potential Index Reduction Percentage, % Drift Potential Index Reduction Percentage, % 3. Results and discussion The DIXRP values of ES nozzle and the correspondong>inong>g standard errors with different nozzle sizes were shown ong>inong> Fig. 2.and 3. Except ES05 nozzles, the DIXRP values of different nozzle-pressure combong>inong>ations experienced a gentle ong>inong>crease as the nozzle sizes ong>inong>creased. The reason why the ong>inong>crease was not obvious could be that comparong>inong>g with other type of nozzles, this type of nozzle had a relatively steady volume median diameter with different nozzle sizes. Based on the manufacturer data, the average value of the volume median diameter of the ES nozzle was 300 μm. The ong>inong>crease of the flow rate might also lead an ong>inong>crease of the drift reduction performance due to the normalization by dividong>inong>g the spray output and the stronger resistance force to wong>inong>d produced by more dense spray. The difference of the droplet sizes and the small flow rate might have contributed to the rapid ong>inong>crease of the DIXRP values from ES05 to ES06. 120.00 100.00 80.00 60.00 40.00 20.00 0.00 -20.00 1.0MPa 1.5MPa ES05-1.00 ES07-1.00 ES09-1.00 ES11-1.00 ES06-1.50 ES08-1.50 ES10-1.50 ES06-1.00 ES08-1.00 ES10-1.00 ES05-1.50 ES07-1.50 ES09-1.50 ES11-1.50 FIGURE 2: DIXRP values obtaong>inong>ed under different nozzle-pressure combong>inong>ations of ES series nozzle with the nozzle height of 0.3m 150.00 100.00 50.00 0.00 -50.00 -100.00 1.0MPa 1.5MPa ES05-1.00 ES07-1.00 ES09-1.00 ES11-1.00 ES06-1.50 ES08-1.50 ES10-1.50 ES06-1.00 ES08-1.00 ES10-1.00 ES05-1.50 ES07-1.50 ES09-1.50 ES11-1.50 FIGURE 3: DIXRP values obtaong>inong>ed under different nozzle-pressure combong>inong>ations of ES series nozzle with the nozzle height of 0.4m Fig. 4 and 5 shows the ong>inong>fluence of the nozzle pressure on the DIXRP values. Expect ES05, the DIXRP values obtaong>inong>ed under two nozzle pressures had just a little fluctuation to each nozzle size and no trend was found. The maong>inong> reasons might be that the ong>inong>fluence of the decrease of the droplet size on the DIXRP values was offset by the ong>inong>crease of the flow rate and the droplet velocity when the nozzle pressure ong>inong>creased.

Drift Potential Index Reduction Percentage, % Drift Potential Index Reduction Percentage, % Drift Potential Index Reduction Percentage, % 120.00 ES05-1.00 ES05-1.50 100.00 ES06-1.00 ES06-1.50 80.00 ES07-1.00 ES07-1.50 60.00 ES08-1.00 ES08-1.50 40.00 ES09-1.00 ES09-1.50 20.00 ES10-1.00 ES10-1.50 0.00 ES11-1.00 ES11-1.50 -20.00 05 06 07 08 09 10 11 FIGURE 4: DIXRP values obtaong>inong>ed under different nozzle-pressure combong>inong>ations of ES series nozzle with the nozzle height of 0.3m 150.00 100.00 ES05-1.00 ES06-1.00 ES05-1.50 ES06-1.50 50.00 ES07-1.00 ES07-1.50 0.00 ES08-1.00 ES09-1.00 ES08-1.50 ES09-1.50 -50.00 ES10-1.00 ES10-1.50 -100.00 05 06 07 08 09 10 11 ES11-1.00 ES11-1.50 FIGURE 5: DIXRP values obtaong>inong>ed under different nozzle-pressure combong>inong>ations of ES series nozzle with the nozzle height of 0.4m The ong>inong>fluence of the nozzle height on the DIXRP values under different nozzle heights were illustrated ong>inong> Fig. 6 and 7. The nozzle height was ong>inong>versely proportional to the DIXRP although the change of the nozzle height was just 0.1m. Comparong>inong>g with the ong>inong>fluence of the nozzle size and pressure on the DIXRP values, the nozzle height might be the most important factor that ong>inong>fluences the drift reduction ability. 120.00 100.00 80.00 60.00 40.00 20.00 ES05-0.3 ES06-0.3 ES07-0.3 ES08-0.3 ES09-0.3 ES10-0.3 ES11-0.3 ES05-0.4 ES06-0.4 ES07-0.4 ES08-0.4 ES09-0.4 ES10-0.4 ES11-0.4 0.00 05 06 07 08 09 10 11 FIGURE 6: DIXRP values obtaong>inong>ed under different nozzle-pressure combong>inong>ations of ES series nozzle with the nozzle pressure of 1.0MPa

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