Influence of Geometrical Parameters of Labyrinth Flow Path of Drip Emitters on Hydraulic and Anti-Clogging Performance

Li, G. Y.; Wang, J. D.; Alam, M. Siraj; Zhao, Yi

doi:10.13031/2013.20483

Cited by 27 publications

(19 citation statements)

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“…The clogging resistance performance varied according to the model of dripper. The results are consistent with the literature and clearly indicate that emitter design is a key aspect in terms of clogging resistance performance [4, 5, 13, 14, 22, 23]. …”

Section: Resultssupporting

confidence: 91%

“…Both models clogged in the last stage of the test; hence they were sensitive to clogging when the concentration of particles was higher than 375 ppm and particle sizes were larger than 212 μ m. The only geometrical difference between both models was the labyrinth depth (a difference of 0.1 mm) and it did not influence dripper sensitivity to clogging. Previous studies had found that clogging resistance capability is more influenced by the geometric design of the flow path than by the cross-sectional area or flow rate of emitters [14]. …”

Section: Resultsmentioning

confidence: 99%

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Methodology to Evaluate Dripper Sensitivity to Clogging due to Solid Particles: An Assessment

Lavanholi

Oliveira

Camargo

et al. 2018

The Scientific World Journal

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Emitter clogging is a major problem in microirrigation systems, which may result from the isolated or combined effects of physical, chemical, and biological agents. Clogging caused by suspended solid particles is the most common plugging form of emitters. Water quality and emitter geometry are key aspects in clogging processes. Any suitable test procedure to assess the sensitivity of drippers to clogging should take into account the predominant factors that influence clogging and must reproduce the field conditions. This research set out to assess the performance and suitability of a laboratory clogging test procedure in order to validate a methodology and to provide scientific results that may support the standardization of a clogging test method. The evaluated methodology has been used by the IRSTEA laboratory since 1974 (Platform of Research and experiment on Science and Technology for Irrigation - PReSTI, formerly LERMI) and its contents are currently being discussed by the ISO TC23/SC18 committee. The aim is to define a standardized testing protocol to evaluate the sensitivity of emitters to clogging due to solid particles. Replications analyzing the clogging resistance of four models of emitting pipes were carried out in a laboratory. The clogging test procedure enabled an accurate assessment of the combinations of concentration and size of particles that caused clogging in each model of dripper. However, a significant variability in degree of clogging was identified when the results of replications for each model of dripper were compared. Several requirements, concerns, and improvements related to the clogging test protocol were discussed.

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Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Methodology to Evaluate Dripper Sensitivity to Clogging due to Solid Particles: An Assessment

Lavanholi

Oliveira

Camargo

et al. 2018

The Scientific World Journal

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show abstract

“…Increasing α by 15°obtained an average increase of 85% in φ, and when the angle was increased by 30°, the increase in φ was approximately 238%. Li et al (2006) mentioned that the tooth angle is one of the constructive parameters that most affects the coefficient of head loss φ in trapezoidal labyrinths. The tooth angle influences the changes in the flow direction, which cause abrupt changes in the flow conditions and cause variations in the minor loss component.…”

Section: Resultsmentioning

confidence: 99%

“…The narrow flow path of the drippers can be clogged easily by particles, inorganic matter, chemical precipitation, biofilm development, and other impurities. Several current studies investigated and optimized the flow path geometrical characteristics to enhance the transport capacity of particles through the labyrinth channel (Feng et al 2018;Li et al 2006;Yu et al 2019;Zhang et al 2011Zhang et al , 2010.…”

Section: Introductionmentioning

confidence: 99%

Prediction of Pressure–Discharge Curves of Trapezoidal Labyrinth Channels from Nonlinear Regression and Artificial Neural Networks

Lavanholi

Camargo

Bombardelli

et al. 2020

J. Irrig. Drain Eng.

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HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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“…As such, it is difficult to ensure the quality of the irrigation spray is good [10,11].In order to solve the problem of clogging in an emitter, earlier studies conducted experiments to investigate the influence of flow passage geometry parameters on the hydraulic characteristics of the emitter. Based on the experimental results, the flow passage of the emitter was optimized so as to improve the anti-clogging performance of the emitter under low pressure [12][13][14][15]. In order to improve the spraying effect of the sprinklers under low pressure, auxiliary sprinklers, jet devices, and water dispersing devices can be added or the original sprinklers can be replaced with non-circular sprinklers [16][17][18].…”

mentioning

confidence: 99%

The Development of a Calculation Model for the Instantaneous Pressure Head of Oscillating Water Flow in a Pipeline

Zhang

Song

Zhu

2019

Water

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Sinusoidal oscillating water flow at low pressure can improve the anti-clogging ability of an emitter in drip irrigation or the water distribution of a nozzle in sprinkler irrigation and reduce the cost and energy consumption of the irrigation system. In this study, the characteristics of instantaneous pressure head attenuation of oscillating water flow along a pipeline have been investigated. By using a complex function to solve the continuity equation and the momentum equation of a pipeline with water hammer motion and using the Darcy–Weisbach formula to estimate the head loss, a calculation model for the instantaneous pressure head of oscillating water flow along a pipeline was developed. The measured value of the amplitude of the pressure head and the average instantaneous pressure head in the experiments have been used to verify the corresponding pressure head calculated by the model. The results show that the amplitude of the pressure head and the average instantaneous pressure head decrease linearly along the pipeline. The calculated value of the amplitude of the pressure head and the average instantaneous pressure head are basically close to the corresponding measured pressure head. From the results of all the tests, the maximum relative error of the calculated and measured value of the amplitude of the pressure head along the pipeline was 9.44%. The maximum relative error of the calculated and measured value of the average instantaneous pressure head along the pipeline was 8.37%. Hence, the model can accurately predict the instantaneous pressure head of oscillating water flow along a pipe and provide a theoretical basis for the application of oscillating water flow in irrigation systems and the design of irrigation pipe networks.

show abstract

Influence of Geometrical Parameters of Labyrinth Flow Path of Drip Emitters on Hydraulic and Anti-Clogging Performance

Cited by 27 publications

References 0 publications

Methodology to Evaluate Dripper Sensitivity to Clogging due to Solid Particles: An Assessment

Methodology to Evaluate Dripper Sensitivity to Clogging due to Solid Particles: An Assessment

Prediction of Pressure–Discharge Curves of Trapezoidal Labyrinth Channels from Nonlinear Regression and Artificial Neural Networks

The Development of a Calculation Model for the Instantaneous Pressure Head of Oscillating Water Flow in a Pipeline

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