Prediction of Spray Angle from Flat Fan Nozzles

Zhou, Qian; Miller, P. C. H.; Walklate, P. J.; Thomas, N. H.

doi:10.1006/jaer.1996.0055

Cited by 24 publications

(18 citation statements)

References 0 publications

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“…Zhou et al (1996) reported that the spray angle (θ) depended on the V-cut angle (α) of the nozzle. The relation between both parameters presented with a polynomial equation can be seen in Eq.…”

Section: Spray Nozzlesmentioning

confidence: 99%

“…The liquid inlet velocity was calculated with Eq. (3) based on the Bernoulli equation (Zhou et al, 1996):…”

Section: Liquid Inlet Velocitymentioning

confidence: 99%

“…According to the equation reported by Zhou et al (1996), the liquid outlet velocity (U e ) without head loss can be calculated using Eq. (4) based on the function of the inlet liquid velocity and spray pressure measured from the back of the nozzle cap.…”

Section: Liquid Outlet Velocitymentioning

confidence: 99%

“…It was stated that the C d values of a new concept variable flow-fan nozzle developed by Womac and Bui (2002) were 0.647-0.959. Zhou et al (1996) determined that the C d of the flat fan nozzles varied between 0.91 and 0.98. The C d values obtained from this study were found compatible with the literature findings.…”

Section: Pressure (Bar)mentioning

confidence: 99%

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Effect of strainer type, spray pressure, and orifice size on the discharge coefficient of standard flat-fan nozzles

Sayinci¹

2015

Turk J Agric For

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IntroductionFlat-fan spray nozzles are widely used nozzle types in pesticide applications. The nozzle orifice, which is rectangular or oval-shaped, is located in the middle of the V-shaped channel on the nozzle body. The spray angles of these nozzles are manufactured with eight different color codes ranging from 65° to 120°. Flow rates of these nozzles are mainly affected by the function of the orifice size and spray pressure, which are the variable parameters. The nozzle flow rate, which is one of the most important measure parameters after manufacturing, is an indicator of nozzle quality. The flow rate at spray pressure of 276 kPa (40 psi) of a nozzle manufactured with different color codes and orifice sizes has been standardized by the ISO International Standards (ISO, 1996) and the American Society of Agricultural and Biological Engineers Standards (ASABE Standards, 2009). According to hydraulic principles, the flow rate of a nozzle is proportional to the square root of spray pressure. This means that the exponent coefficient of spray pressure is 0.50. This is commonly applied to all nozzles, but it is in fact erroneous to do so. In particular, nonspiral design full cone nozzles and wide angle full cone nozzles have an exponent of 0.46 or 0.44 (Spraying Systems Co., 2014). This information indicates that the flow characteristics of a nozzle depend on its design attributes.Sayıncı (2014) determined that the nozzle strainers lead to change in the pressure exponent coefficient, which is the relation between flow rates and spray pressures of spray nozzles. The exponent coefficient ranged between 0.48 and 0.49 for the nozzles used with standard types of nozzle strainers, and between 0.55 and 0.57 for the nozzles used with ball check strainers.Nozzle strainers, which are a crucial part of a sprayer, are located in the nozzle body to screen out the debris

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Section: Spray Nozzlesmentioning

confidence: 99%

“…The liquid inlet velocity was calculated with Eq. (3) based on the Bernoulli equation (Zhou et al, 1996):…”

Section: Liquid Inlet Velocitymentioning

confidence: 99%

Section: Liquid Outlet Velocitymentioning

confidence: 99%

Section: Pressure (Bar)mentioning

confidence: 99%

See 2 more Smart Citations

Effect of strainer type, spray pressure, and orifice size on the discharge coefficient of standard flat-fan nozzles

Sayinci¹

2015

Turk J Agric For

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“…Most of the reported measurements of discharge coefficient reported in the literature are those by Sayinci (2015aSayinci ( , 2015b and Sayinci and Kara (2015), as well as the measurements by Womac and Bui (2002) and Zhou et al (1996). In research where droplet velocities have been measured at the location of sheet breakup, such as with PIV, those velocities can be used to calculate the discharge coefficient as well.…”

Section: Literature Reviewmentioning

confidence: 99%