Characteristics of water and droplet size distribution from fluidic sprinklers

Liu, Junping; Yuan, Shouqi; Darko, Ransford Opoku

doi:10.1002/ird.2061

Cited by 14 publications

(5 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The above outcomes suggested that the nozzle size and operating pressure had little effect on droplet diameters near the low‐pressure sprinkler, and their effects were mainly reflected in the droplet distribution in the latter half of the jet (Chen et al, 2020). Specifically, higher operating pressures corresponded to smaller volum‐ weighted average diameters at the same distance from the sprinkler, as previously reported by Ge et al (2020) on 50PYC and HY50 big gun‐type sprinklers and Liu, Yuan, et al (2016) on a PXH sprinkler. This is mainly because a larger sprinkler operating pressure will result in a faster jet velocity.…”

Section: Results and Analysissupporting

confidence: 83%

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

Hui

Zheng

Meng

et al. 2022

Irrigation and Drainage

View full text Add to dashboard Cite

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.

show abstract

Section: Results and Analysissupporting

confidence: 83%

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

Hui

Zheng

Meng

et al. 2022

Irrigation and Drainage

View full text Add to dashboard Cite

show abstract

“…The experiments were carried out in the irrigation laboratory of the Research Center of Fluid Machinery Engineering and Technology of Jiangsu University, China. The irrigation laboratory is an indoor windless test room with a diameter of 44 m and a height of 18 m. The laboratory can provide measurement and data acquisition conditions (Liu, Yuan, et al, 2016). The environmental temperature was 25°C during the test.…”

Section: Methodsmentioning

confidence: 99%

Optimization and numerical simulation of the internal flow field of water–pesticide integrated microsprinklers

Liu

Hussain

Wang

et al. 2023

Irrigation and Drainage

Self Cite

View full text Add to dashboard Cite

A new type of water–pesticide integrated microsprinkler has been developed in this study. Microsprinklers can irrigate crop roots to meet the irrigation index demand under low‐pressure conditions and apply pesticides on the backs of crop leaves to meet the spraying pesticide index demand under medium‐pressure conditions. In this paper, the structure and working principle of the water–pesticide integrated microsprinkler are discussed, and the key structural parameters are the number and diameter of the small round holes and the number and width of bevel grooves. Computational fluid dynamics (CFD) numerical simulations were performed to analyse the influence and variation in the key structural parameters on the microsprinkler flow field. The optimized structural parameters of the microsprinkler were determined: The outlet nozzle diameter was 3 mm, with three small round holes of 2 mm diameter and three bevel grooves of 0.8 mm width. The hydraulic performance of the optimized sprinkler and original sprinkler (outlet nozzle diameter was 2.5 mm, with two small round holes of 3 mm diameter and four bevel grooves of 1 mm width) were compared under different working pressure conditions. The results showed that the wetted radius and uniformity coefficient of the optimized sprinkler increased by 23% and 16%, respectively.

show abstract

“…Hence, it has a significant influence on the growth of crops and is one of the important indexes to evaluate the quality of sprinkler irrigation. Christiansen's uniformity coefficient (CU) was defined to evaluate sprinkler irrigation systems and has the strongest historical precedent in the sprinkler irrigation industry [23,24]. Christiansen's equation is defined as:…”

Section: Evaluation Indexmentioning

confidence: 99%

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

Tang

Chao

2020

Sustainability

View full text Add to dashboard Cite

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.

show abstract

Characteristics of water and droplet size distribution from fluidic sprinklers

Cited by 14 publications

References 24 publications

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

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

Optimization and numerical simulation of the internal flow field of water–pesticide integrated microsprinklers

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

Contact Info

Product

Resources

About