Comparisons of spray characteristics between vertical impact and turbine drive sprinklers—A case study of the 50PYC and HY50 big gun-type sprinklers

Ge, Maosheng; Wu, Pute; Zhu, Delan; Zhang, Lin

doi:10.1016/j.agwat.2019.105847

Cited by 24 publications

(17 citation statements)

References 36 publications

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“…The improvement was lower under high-pressure conditions because the water distribution already had a good uniformity. Ge et al [9] indicated that the maximum distribution uniformity coefficients of the vertical impact sprinkler can reach 80.5% under high-pressure conditions, and this was consistent with the results of this study. The maximum application rates in the overlap area were decreased from 18, 16, 16 and 15 mm•h −1 to 16, 14, 14 and 12 mm•h −1 with operating pressures of 300, 400, 500 and 600 kPa, respectively.…”

Section: Optimization and Validationsupporting

confidence: 93%

“…The improvement was lower under highpressure conditions because the water distribution already had a good uniformity. Ge et al [9] indicated that the maximum distribution uniformity coefficients of the vertical impact sprinkler can Figure 7 compares the spatial water distribution before and after optimization with square layout, with 1.41 times radius of throw at different operating pressures. The figure shows that after the optimization of the blades' structure, the water distribution uniformity in the overlap area improved, especially under low-pressure conditions.…”

Section: Optimization and Validationmentioning

confidence: 99%

“…The sprinkler is the key piece of equipment for sprinkler irrigation, and the hydraulic and operating performance determines the quality of the irrigation system to a great extent [7,8]. The vertical impact sprinkler is the most presentable middle-high pressure (>300 kPa) rotating sprinkler, and the most widely used in both solid set spray and hose-drawn traveler irrigator systems [9,10].…”

Section: Introductionmentioning

confidence: 99%

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Improving Water Distribution Uniformity by Optimizing the Structural Size of the Drive Spoon Blades for a Vertical Impact Sprinkler

Tang

Chao

2020

Sustainability

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The aim of this study is to improve the water distribution uniformity of a vertical impact sprinkler and explore the design method of the drive spoon blades. The width of straight blades (h1), the width of curved blades (h2) and number of blades (s) were chosen as the experiential variables. The suitable ranges of three variables for response surface method were determined initially by one-factor experimental design method, and 17 different drive spoons were designed according to response surface methodology. The results showed that in the one-factor experimental condition, the CU (Christiansen’s uniformity coefficient) values first increased and decreased slightly when h1 exceeded 3 mm with the increase of h1 within the variation range of the experimental factor. The CU values firstly increased and then decreased with the increase of h2. The CU values decreased rapidly when s was less than 3 or greater than 6. The relationship between CU values and h1, h2 and s was established using response surface methodology. The p-values for h1, h2 and s were 0.0359, 0.0092, 0.0212, and all of the selected factors were significant on CU. The order of parameters affecting CU were h2, h1 and s. The ideal parameters for the drive spoon blades were h1 = 6 mm, h2 = 4 mm, and s = 3. CU was greatly improved after the optimization of structure for the drive spoon blades, which increased to 87.96% from 73.12%. After optimization, the application rates within 1 to 5 m were improved and increased from 10% to 15% with an average of 10.7% under different operating pressures. The maximum application rates decreased from 9.3, 9.3, 9.4 and 8.4 mm·h−1 to 8.5, 8.4, 8.5 and 7.9 mm·h−1 with operating pressures of 300, 400, 500 and 600 kPa, respectively. The maximum application rates in the overlap area were decreased from 18, 16, 16 and 15 mm·h−1 to 16, 14, 14 and 12 mm·h−1 with operating pressures of 300, 400, 500 and 600 kPa, respectively.

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Section: Optimization and Validationsupporting

confidence: 93%

Section: Optimization and Validationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Improving Water Distribution Uniformity by Optimizing the Structural Size of the Drive Spoon Blades for a Vertical Impact Sprinkler

Tang

Chao

2020

Sustainability

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“…The VMDs of the sprinkler under different operating pressures are shown in Figure 7. The droplet diameter increased exponentially with distance from the sprinkler, in accordance with the previous studies [14,19,34]. However, the sprinklers of interest in these studies were impact sprinklers and FSPSs.…”

Section: Droplet Sizesupporting

confidence: 91%

“…Due to the low breakup degree of the jet flow under low working pressure, the specific power and application rate under 100 kPa were significantly higher than those under other working pressures (Figures 6 and 12). It is easy to lead a lower infiltration rate and increase the formation of surface seal and runoff [34]. Meanwhile, the specific power increased with increasing nozzle size.…”

Section: Discussionmentioning

confidence: 99%

Effects of Pressure and Nozzle Size on the Spray Characteristics of Low-Pressure Rotating Sprinklers

Chen

Wang

et al. 2020

Water

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Using low-pressure sprinklers in agricultural irrigation has become an alternative way of reducing water and energy stress. To determine the applicability of the low-pressure rotating sprinkler, an experiment was conducted to evaluate the effects of working pressure and nozzle size on sprinkler rotation speed, application rate, droplet size, droplet velocity, droplet trajectory angle, and kinetic energy distribution. The results showed that the mean droplet diameter increased exponentially along with the increase in distance from the sprinkler, and a logarithmic relation was derived between droplet diameter and droplet velocity. Due to the low breakup degree of the jet under the lowest working pressure of 100 kPa, the peak values of specific power and application rate were high, which reached 0.09 W m−2 and 11.35 mm h−1, and were 3.1–5.4 times and 2.5–3.1 times those of other working conditions. Meanwhile, the peak specific power of the biggest nozzle (diameter = 5.2 mm) was 2.4–2.8 times that of smaller nozzles. With an increase in working pressure, the sprinkler time per rotation decreased and the distributions of kinetic energy and water became more uniform. Thus, it is not recommended to equip the sprinkler with a large nozzle under low working pressure.

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Comprehensively evaluating and modelling droplet diameters and kinetic energies of low‐pressure sprinklers

Hui

Zheng

Meng

et al. 2022

Irrigation and Drainage

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Proper droplet diameter and kinetic energy can effectively reduce the risk of soil erosion during low-pressure sprinkler irrigation. In this study, we comprehensively evaluated the radial distributions of droplet diameter, velocity, kinetic energy, kinetic energy per unit droplet volume, and specific power for three common low-pressure sprinklers, i.e. Nelson D3000, R3000 and Komet KPT, with two operating pressures (103 and 138 kPa) and three nozzle outlet diameters (3.97, 5.95 and 7.94 mm). Additionally, the relationships between these droplet characteristic parameters were analysed. Overall, the maximum values of five characteristic parameters were observed at the end of the jet under various treatments. Although R3000 had a larger droplet diameter (0.10-6.42 mm) and kinetic energy (1.08 Â 10 À10 -8.59 Â 10 À3 J) distribution range than D3000 and KPT, the D3000 specific power (mean value of 0.4274 W m À2 ) was the highest of the three sprinklers. Therefore, KPT was suggested more in low-pressure sprinkler irrigation than in the other two sprinklers because its application rates were reduced along the radial direction. In addition to selecting a suitable sprinkler type for minimizing specific power, determining a reasonable sprinkler spacing was also significant (P < 0.01). Furthermore, a universal specific power model with an appropriate accuracy (RMSE = 0.011 W m À2 , NRMSE = 29%) was proposed. This study provides a key basis for the selection and combination of low-pressure sprinklers.droplet diameter, kinetic energy, low-pressure sprinklers, specific power, universal model Résumé Un diamètre de gouttelettes et une énergie cinétique appropriés peuvent réduire efficacement le risque dérosion des sols lors de l'irrigation par aspersion à basse pression. Dans cette étude, nous avons évalué de façon complète les distributions radiales du diamètre des gouttelettes, de la vitesse, de l'énergie cinétique, de l'énergie cinétique par unité de volume des gouttelettes, et de la puissance spécifique pour trois sprinklers courants à basse pression, à savoir Nelson D3000, R3000 et Komet KPT, avec deux pressions de fonctionnement (103 et 138 kPa) et trois diamètres de sortie de la buse (3,97, 5.95 et 7.94 mm). De plus, Article title in French: Evaluation et modélisation complètes des diamètres de gouttelettes et des énergies cinétiques des sprinklers basse pression.

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Comparisons of spray characteristics between vertical impact and turbine drive sprinklers—A case study of the 50PYC and HY50 big gun-type sprinklers

Cited by 24 publications

References 36 publications

Improving Water Distribution Uniformity by Optimizing the Structural Size of the Drive Spoon Blades for a Vertical Impact Sprinkler

Improving Water Distribution Uniformity by Optimizing the Structural Size of the Drive Spoon Blades for a Vertical Impact Sprinkler

Effects of Pressure and Nozzle Size on the Spray Characteristics of Low-Pressure Rotating Sprinklers

Comprehensively evaluating and modelling droplet diameters and kinetic energies of low‐pressure sprinklers

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