Modeling and hydraulic performance evaluation of a dripper device coupled to a branched water distribution network

Zanca, Renato Braga; Silva, Fernando das Graças Braga da; Sant’Anna, Daniele Ornaghi; Silva, Alex Takeo Yasumura Lima; Nova, Helcio Francisco Villa; Santos, Ivan Felipe dos; Reis, José Antônio Tosta dos

doi:10.4136/ambi-agua.2340

Cited by 2 publications

(2 citation statements)

References 13 publications

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“…The results showed that the water energy dissipation per unit length of the triangular channel was larger than that of the rectangular, trapezoidal, and circular channels. Zanca et al [10] used CFD software to optimize the dripper structure and investigated the mechanism of droplet formation at the exit of the drip head.…”

Section: Introductionmentioning

confidence: 99%

Mechanism Analysis of the Influence of Structural Parameters on the Hydraulic Performance of the Novel Y-Shaped Emitter

et al. 2023

Agriculture

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As a key component of a drip irrigation system, the performance of drip irrigation emitters is determined by the flow channel structures and parameters. In this paper, a novel Y-shaped labyrinth-channel emitter was proposed, and the influence of the hydraulic performance was researched under different waist-arc angles (α) and ratios of crown height to chord length (a:b). The flow characteristics and energy dissipation mechanisms of water in the emitter were analyzed by using fluid dynamics software. The analysis showed that, keeping the ratio of crown height to chord length unchanged and with an increase in the waist-arc angle from 90° to 180°, the pressure-drop ratio before and after the water flow through the vortex area increased, and the hydraulic performance of the emitter was improved, specifically: the design flow could be reduced by 6.02–26.7%, and the slope of the curve could be reduced by 9.83–28.1%. The smaller the ratio of crown height to chord length, the weaker the influence of waist-arc angle was on the design flow and hydraulic performance. Keeping the waist-arc angle unchanged, there was a decrease in the ratio of crown height to chord length from 6:30 to 1:30, the vortex strength inside the emitter channel increased, and the hydraulic performance was improved: the design flow could be reduced by 7.56–23.5%, and the slope of the curve could be reduced by 5.43–20.5%. The bigger the waist-arc angle, the weaker the influence of the ratio of crown height to chord length was on the design flow and the hydraulic performance, even to the point of having no effect. When the Y-shaped emitter was close to the pressure-flow curve slope of the commonly-used triangular-channel emitter, the hydraulic performance of the two was similar, and the former could increase the channel width by 25%, as compared to the latter, or shorten the channel length by 44.3%. The results showed that the Y-shaped emitter had better hydraulic performance compared with the triangular-flow-channel emitter commonly used today. Therefore, the Y-shaped emitter has broad application prospects in water-saving irrigation.

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Section: Introductionmentioning

confidence: 99%

Mechanism Analysis of the Influence of Structural Parameters on the Hydraulic Performance of the Novel Y-Shaped Emitter

et al. 2023

Agriculture

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“…Irrigation accounts for approximately 70% of the world's freshwater consumption and is one of the key factors behind the growing global water scarcity (Zanca et al, 2019). China plays an important role in global grain production.…”

Section: Introductionmentioning

confidence: 99%

Irrigation schedule optimization based on the combination of an economic irrigation quota and the AquaCrop model*

Zhao

Jiang

2021

Irrigation and Drainage

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Currently, with the shortage of agricultural water resources, research on water-saving irrigation is of great significance for the improvement of water productivity. In this research, the economic irrigation quotas for summer maize in years with different precipitation levels were determined according to the growth function of summer maize, aiming to maximize the net benefit of water consumption units. Based on the economic irrigation quotas, the irrigation schedule of summer maize was optimized by the AquaCrop model. The results show that in wet years, summer maize does not need irrigation. In normal years, summer maize only needs to be irrigated once at the seedling stage and once at the jointing stage to reach a maximum yield of 7.23 t/ha and a water productivity of 2.25 kg/m 3 , with an irrigation quota of 25 mm and a total irrigation amount of 50 mm. In dry years, summer maize needs to be irrigated once at the seedling stage, jointing stage, and flowering stage, with an irrigation quota of 46.6 mm and a total irrigation amount of 140 mm. Under this condition, the summer maize yield reaches a maximum of 7.20 t/ha, and the water productivity is 1.99 kg/m 3 . K E Y W O R D Sirrigation quota, net benefit, summer maize, water productivity, water unit consumption Rėsumė Actuellement, avec la pénurie de ressources en eau pour l'agriculture, la recherche sur l'irrigation économisant l'eau est d'une grande importance pour améliorer l'efficacité de l'utilisation de l'eau, la productivité de l'eau. Dans cet article, les quotas d'irrigation économique pour le maïs d'été pendant les années avec différents niveaux de précipitations ont été déterminés en fonction de la fonction de croissance du maïs d'été, dans le but de maximiser le bénéfice net des unités de consommation d'eau. Sur la base des quotas d'irrigation économiques, le programme d'irrigation du maïs d'été a été optimisé par le modèle de culture AquaCrop. Les résultats montrent que pendant les années humides, le maïs d'été n'a pas besoin d'irrigation. Les années normales, le maïs d'été n'a besoin d'être irrigué qu'une fois au stade semis et une fois au *Optimisation du calendrier d'irrigation basée sur la combinaison d'un quota d'irrigation économique et du modèle AquaCrop

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Modeling and hydraulic performance evaluation of a dripper device coupled to a branched water distribution network

Cited by 2 publications

References 13 publications

Mechanism Analysis of the Influence of Structural Parameters on the Hydraulic Performance of the Novel Y-Shaped Emitter

Mechanism Analysis of the Influence of Structural Parameters on the Hydraulic Performance of the Novel Y-Shaped Emitter

Irrigation schedule optimization based on the combination of an economic irrigation quota and the AquaCrop model*

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