Study of Some Parameters Affecting Spray Distribution Uniformity Patteren

Abstract

The aims of the present research was to investigate of the effect of the cross wind speed on the pattern of liquid spray and study the interaction between the wind speed, the height of boom, type of nozzles and nozzle pressure and their effects on the spray of pattern. The electrical axial fan of 2.2 kW was used to produce the cross wind speed of 1.2 and 3.1m s-1. The IDKN120-04, AD110-03, TT11003 Turbo Jet and ATR 208 (Albus) spray nozzles were used at different nozzle pressures. Tests were conducted in the laboratory using an experimental spray patternator with 150 collection tubes (3 meters wide) at three nozzle pressures of 300, 400 and 500 kPa for IDKN Lechler, TT11004 and Turbo Jet nozzle at wind speeds 1.2 and 3.1m s-1 of the trajectory of liquid and without wind speed (0 m s-1). The nozzle pressures for ATR208 (Albus) nozzle were 300, 400, and 500 kPa at the same wind conditions. Results indicated that the wind speed affected the uniformity of dose under laboratory conditions. The IDKN120-04 nozzle gave the low effect compared to the others nozzles.

Modification of Pesticide Sprayer to Suit the Orchard Trees تعديل الة رش المبيدات لتناسب اشجار البساتين

“…An increase in the average of number of droplets/cm 2 from 35.77 to 40.22 on the upper leaf surface and from 20.44 to 23.77 on the lower leaf surface was observed when the "OP" increased from 1000 to 2000 kPa. These findings are in agreements with that obtained by Sehsah and Kleisinger, (2009), Dahab andEltahir, (2010) andSuber, et al (2017).…”

“…Operating pressure considered one of the most important parameters that affect the spraying uniformity (He et al, 2013). Increasing the nozzle pressure tends to increase the droplet density and number of small size droplets with better uniformity distribution (Sehsah and Kleisinger 2009, Dahab and Eltahir, 2010and Suber et al, 2017 However, increasing the pressure does not confirm constant uniformity of the spray distribution for some types of nozzles (Višacki et al, 2016 andPadhee et al 2019).…”

Effects of Operating Pressure on Hydraulic Energy Nozzle Suitable for Herbicide Application

“…Irrespective of pressure N 2 nozzle (0.75 orifice size ) recorded maximum discharge rate of1.19 lit/min at 50 psi followed byN 1 nozzle (0.5 mm orifice size) 1.01 lit/min at 50 psi as shown in Figure 1. The selected nozzles discharge rate gradually increases with increasing pressure, which was in close agreement with the results reported by Senthil Kumar (2007) and Singh (2006).…”

“…The coefficient of variation in spray distribution was lowest for0.75 mm orifice size nozzle (N 2 ) as compared to other nozzles. The N 2 nozzle gave best results at a pressure of40 psi with least coefficient of variation of 18.69 percent which was in close agreement with the results reported by Sehsah et al, (2009) and Syed Imran et al, (2018).…”

Studies on Operational Parameters of Different Spray Nozzles

“…This effect may be due to increase in the spray angle as the operating pressure was increased, so that the spray distribution was more uniform. In the later stages, there was no improvement in the spray angle; hence CV was recorded to be constant from that point of operating pressure (Sehsah and Kleisinger, 2009).It was also observed that, as the nozzle height was increased there was a decrease in the CV of volumetric distribution, as more uniform distribution of spray spectrum was observed.…”