Droplet Size Characterization of the New Type Complete Fluidic Sprinkler

Dwomoh, Frank Agyen; Yuan, Shouqi; Li, Hong

doi:10.9790/1684-11467073

Cited by 12 publications

(9 citation statements)

References 14 publications

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Section: Velocity Number Of Drops and Drop Diameter Relationshipsupporting

confidence: 92%

“…In general, a greater number of drops were collected near the sprinkler than further away from the sprinkler nozzle. This agrees with the results of [14,24,25] that the density of drops decreased with increasing radial distances. It is important to highlight that even though the prevailing wind condition had a wind direction of 10° to 300° (Figure 3), it was ensured that measurements were taken only when the wind direction was parallel to and not contrary to the direction of the throw of water.…”

Section: Velocity Number Of Drops and Drop Diameter Relationshipsupporting

confidence: 92%

“…The Thiess Clima Laser Precipitation Monitor (TCLPM) manufactured by Adolf Thiess GMBH and Co. KG, Gottingen, Germany [18], flow meter, pressure gauge, and connecting pipes to the source of water were used. Drop size measurements were performed using the TCLPM in both no wind conditions inside a circular building facility of 44 m diameter, shown in Figure 1c and in wind conditions, shown in Figure 1b,d [21,22], for comparison purposes. The TCLPM works such that a laser-optical beaming source produces a parallel light-beam (infrared, 785 nm).…”

Section: Experimental Set-upmentioning

confidence: 99%

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Analysis of Water Droplet Distribution in Wind for the Fluidic Sprinkler

Dwomoh

Yuan

et al. 2020

Water

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The fluidic sprinkler, a relatively new type of rotating sprinkler, has been the subject of quite a lot of research about its structural parameters, hydraulic characteristics, and water distribution profile, albeit under indoor conditions. The fluidic sprinkler’s performance in terms of water distribution profile and droplet size distribution pattern in wind has seen little investigation. To obtain information about its droplet size distribution in wind, the Thiess Clima Laser Precipitation Monitor was employed. Drop diameter, drop velocity, and the number of drops at varying distances from the fluidic sprinkler were measured in both wind and no wind at three operating pressures of 250, 300, and 350 kPa. The logistic model was adopted to fit a relationship between the drop diameter and the cumulative numeric frequency (CNF) and the cumulative volumetric frequency (CVF) values resulting in very high correlation coefficient (R2) values of above 0.99 for all conditions. At 250, 300, and 350 kPa, drops traveled 0.6, 1.0, and 1.3 m, respectively, farther in wind than in no wind along the direction of throw. Drops exhibited a spectrum of velocities and diameters at a given radial distance from the sprinkler. Up to two-thirds of the radius of throw, the proportion of drops with diameters ranging from 0.125 mm to 1.00 mm were above 80% at 300 and 350 kPa.

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Section: Velocity Number Of Drops and Drop Diameter Relationshipsupporting

confidence: 92%

Section: Velocity Number Of Drops and Drop Diameter Relationshipsupporting

confidence: 92%

Section: Experimental Set-upmentioning

confidence: 99%

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Analysis of Water Droplet Distribution in Wind for the Fluidic Sprinkler

Dwomoh

Yuan

et al. 2020

Water

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“…Variations in the rotation speed of the sprinkler may have a negative effect on the range of water application intensity and efficiency of the sprinkler (Strong, 1966;Solomon, 1987;Dogan et al, 2008;Shi et al, 2021). Dwomoh et al (2014a) compared the rotation speed variation of the PXH20 fluidic sprinkler and the PY20 impact sprinkler, considering the effect of water application intensity and uniformity of application at 250, 300, and 350 kPa operating pressures. An inverse linear relation was observed between the rotation time in the quadrants of rotation and application intensity.…”

Section: Uniformity Of Rotation Speedmentioning

confidence: 99%

Structural design and performance characteristics of the fluidic sprinkler application technology for saving irrigation water: a review

Dwomoh,

Zhu,

Fordjour

et al. 2023

J. Agric. Eng.

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The fluidic sprinkler was designed to have the prospect of a simple design, ease of construction, low energy consumption, and water saving. The present review focused on the fluidic sprinkler, compared the performance parameters of the fluidic sprinkler with the impact sprinkler, and highlighted the main challenges associated with the fluidic sprinkler. Even though the fluidic sprinkler compares quite well with the impact sprinkler, the review highlighted that the fluidic sprinkler appears to have more variability in application rate (0-1.5 mm/h) than the impact sprinkler (0-0.8 mm/h). The wetted radii were, on average, less than the impact sprinkler by 9.7, 9.3, 11.0, and 9.9% at 200, 250, 300, and 350 kPa operating pressures, respectively. Experiments on the fluidic sprinkler have mainly concentrated on the structural design of the fluidic component, water distribution profile, coefficient of uniformity, droplet size characterisation, and rotation uniformity, as well as the effect of different nozzle sizes on hydraulic performance under varying discharge and pressure conditions ranging from 100-500 kPa under indoor conditions. However, experimental studies on its performance in the field remain scanty. Statistical analysis of research papers published on the fluidic sprinkler indicates that less than 10% of the studies focused on the performance of the fluidic sprinkler on the field, and more than 90% on the design, structural and hydraulic performance under indoor conditions. Rotation stability of the fluidic sprinkler and testing with different sizes of the nozzle under low-pressure conditions on the field require further research to achieve energy and water saving through optimisation of the operating conditions.

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“…Two new prototype sprinklers, which were being adopted in the move toward low energy precision irrigation, may soon replace impact sprinkler [21][22][23][24] . Dwomoh et al have experimentally determined the droplet size distribution characteristics of one new type of sprinkler, complete fluidic sprinkler [25] . Zhu et al compared the mean droplet diameter of different types of fluidic sprinkler [26] .…”

Section: Introductionmentioning

confidence: 99%

Comparison of droplet distributions from fluidic and impact sprinklers

Zhu¹,

Yuan²,

Liu³

et al. 2015

Front. Agr. Sci. Eng.

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To adapt to the trend toward low-energy precision irrigation, the droplet distributions for two new prototype sprinklers, outside signal sprinkler (OS) and fluidic sprinkler (FS), were compared with impact sprinkler (IS). A laser precipitation monitor was used to measure the droplet distributions. Droplet size and velocity distributions were tested under four operating pressures for nozzles 1.5 m above the ground. For the operating pressures tested, the mean OS, FS and IS droplet diameters ranged from 0 to 3.4, 0 to 3.5, 0 to 4.0 mm, respectively. The mean OS and FS droplet velocities ranged from 0 to 6.3 m$s greater velocity than OS and FS. A new empirical equation is proposed for determination of droplet size for OS and FS, which is sufficiently accurate and simple to use. Basic statistics for droplet size and velocity were performed on data obtained by the photographic methods. The mean droplet diameter (arithmetic, volumetric and median) decreased and the mean velocity increased in operating pressure for the three types of sprinkler.

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Droplet Size Characterization of the New Type Complete Fluidic Sprinkler

Cited by 12 publications

References 14 publications

Analysis of Water Droplet Distribution in Wind for the Fluidic Sprinkler

Analysis of Water Droplet Distribution in Wind for the Fluidic Sprinkler

Structural design and performance characteristics of the fluidic sprinkler application technology for saving irrigation water: a review

Comparison of droplet distributions from fluidic and impact sprinklers

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