Comparisons of Spray Characteristics  between Non-circular and Circular  Nozzles with Rotating Sprinklers

Chen, Rui; Hong, Li; Wang, J.; Guo, Xin; Song, Zhuoyang

doi:10.13031/aea.14688

Cited by 9 publications

(5 citation statements)

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“…Under the same operating pressure and nozzle size, the circulation flow rates and non-circular injectors were equal, while the circular nozzle's throw radius was greater than that of the non-circular nozzle. In addition, the circular nozzle generates larger droplets than the non-circular nozzle [66].…”

Section: Sprinkler Irrigationmentioning

confidence: 99%

Smart Irrigation Systems: Overview

et al. 2024

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Countries are collaborating to make agriculture more efficient by combining new technologies to improve its procedure. Improving irrigation efficiency in agriculture is thus critical for the survival of sustainable agricultural production. Smart irrigation methods can enhance irrigation efficiency, specially with the introduction of wireless communication systems, monitoring devices, and enhanced control techniques for efficient irrigation scheduling. The study compared on a wide range of study subjects to investigate scientific approaches for smart irrigation. As a result, this project included a wide range of topics related to irrigation methods, decision-making, and technology used. Information was gathered from a variety of scientific papers. So, our research relied on several published documents, the majority of which were published during the last four years, and authors from all over the world. In the meantime, various irrigation initiatives were given special attention. Following that, the evaluation focuses on the key components of smart irrigation, such as real-time irrigation scheduling, IoT, the importance of an internet connection, smart sensing, and energy harvesting.INDEX TERMS Smart irrigation, Soil monitoring, Smart agriculture, IoT, Energy harvesting.• Pressurized distribution: The pressurized systems'main components are a trickle, sprinkler, and array of the same systems, where water is carried and spread along the land surface within networks of pressurized pipes. Besides, many individual systems configurations are presented by novel features, such as centre-pivot sprinkler systems. • Gravity-flow distribution: Systems based on gravityflow carry and distribute the water at the field level through the overland, free-surface flow regime. These mentioned surface irrigation methods are split based on the operational specifications and configuration. • Drainage flow distribution: An irrigation system using drainage control-sub-irrigation is not commonly used.

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Section: Sprinkler Irrigationmentioning

confidence: 99%

Smart Irrigation Systems: Overview

et al. 2024

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“…In this experiment, the 2DVD was used to measure the droplet size, angle and velocity of droplets near the surface [21]. Ge et al [22] and Chen et al [23] have also explained the use of the 2DVD technology.…”

Section: Experimental Setup and Proceduresmentioning

confidence: 99%

“…Based on the water application patterns of a single sprinkler, the irrigation uniformity of four adjacent sprinklers with different combined spacing was predicted by simulating the water overlap on the spraying profile. The simulation was based on the cubic-spline interpolation method, which was explained by Chen et al [23]. The Christiansen uniformity coefficient (C U ) was used to evaluate the combined sprinkler irrigation uniformity.…”

Section: Irrigation Uniformitymentioning

confidence: 99%

Experimental Study on Droplet Characteristics of Rotating Sprinklers with Circular Nozzles and Diffuser

et al. 2022

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The characteristics of spray droplets are important for calculating the hydraulic performance of sprinklers. In order to evaluate the effects of working pressure and nozzle diameter on the near ground droplet characteristics of the Nelson R33 sprinkler, an experiment was conducted to test the droplet size and velocity by using a two-dimensional video disdrometer (2DVD). Based on the water application rate, droplet diameter and velocity, the kinetic energy was calculated. The results show that there is an exponential positive correlation between the range and the volume-weighted mean particle size of droplets (VMD). The average kinetic energy of a single droplet fits well with the power function model. Under the minimum pressure of 200 kPa, the diameter and kinetic energy of droplets are large, and the peak values are 5.67 mm and 0.0092 J, which are 1.14 to 1.62 times and 1.18 to 5.68 times those of other working conditions, respectively. When the nozzle diameter is the smallest (4.4 mm), the droplet diameter and peak kinetic energy are 1.12 to 1.58 times and 1.02 to 1.26 times higher than 4.8 and 5.2 mm. Therefore, it is not recommended to work under the condition of less than 250 kPa, and a small-diameter nozzle should be selected while ensuring uniform kinetic energy.

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“…Liu et al (2019) experimentally investigated the effects of working pressure, nozzle diameter and mounting height on the combined uniformity by using an R33 sprinkler at different wind speeds. Furthermore, Chen et al (2022) compared and evaluated the impact of the nozzle outlet shape on the combined uniformity of the R33 sprinkler. The authors found that non‐circular outlet shapes resulted in higher combined uniformity.…”

Section: Introductionmentioning

confidence: 99%

Hydraulic performance of the rotational damping sprinkler: Analysis of the force acting on diffuser tooth I

Pan

Jiang

et al. 2023

Irrigation and Drainage

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Improving water distribution uniformity is crucial for the development of high‐performance irrigation sprinklers, and the diffuser's tooth length greatly influences water distribution. Five diffusers with varying tooth I lengths were designed and researched. The expressions for the force acting on tooth I, the hydraulic performance of the sprinkler and the combination uniformity were obtained analytically and experimentally. The results showed that the tooth I force is affected by the working pressure, the ratio between the plate outlet area and the riser pipe flow area, tooth width, entry water depth, trajectory angle and tooth I slope surface angle. Moreover, the components of the tooth I force acting in the vertical, radial and circumferential directions increase with the tooth I length and working pressure. The necessary condition for normal diffuser operation is that the force in the aforementioned three directions should be greater than 0.37, 0.57 and 0.28 N, respectively. Furthermore, when the working pressure is increased by 50 kPa, hereby reducing the rotation time by 10 min and the tooth I length by 1 mm, its water distribution and combination uniformity are optimal. This study provides a basis for designing and operating diffusers and improving sprinkler hydraulic performance.

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Comparisons of Spray Characteristics between Non-circular and Circular Nozzles with Rotating Sprinklers

Cited by 9 publications

References 0 publications

Smart Irrigation Systems: Overview

Smart Irrigation Systems: Overview

Experimental Study on Droplet Characteristics of Rotating Sprinklers with Circular Nozzles and Diffuser

Hydraulic performance of the rotational damping sprinkler: Analysis of the force acting on diffuser tooth I

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