| Simulation and experimental study on lateral sediment transport in drip irrigation with return pipe |
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| DOI：10.7606/j.issn.1000-7601.2017.02.28 |
| Key Words: sand movement emitter clogging CFD return pipe flow rate of lateral pipe |
| Author Name | Affiliation | | LU Jin-suo | College of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, Shaanxi 710055, China
Key Laboratory of NothWest Water Resource and Environment Ecology Ministry of Education, Xi'an, Shaanxi 710055, China | | LU Ze-xing | College of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an, Shaanxi 710055, China | | YU Jian | Inner Mongolia Autonomous institute of water resources research, Hohehot, 010020, China | | SHI Ji-gang | Inner Mongolia Autonomous institute of water resources research, Hohehot, 010020, China |
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| Abstract: |
| In order to explore the sediment transport potentials of lateral in drip irrigation system with return pipe, this paper utilized the numerical method by CFD and intermittent drip irrigation method to study the movement regulation of sand particles and movement state of liquid-solid two-phase flow in lateral. The result showed that with the increase of flow velocity in lateral ,the number of particles enter into emitter reduced significantly; when the flow rate is 0.05～0.2 m·s-1, the turbulence intensity and turbulence region in the lateral were reduced with the increase of flow velocity. When the flow rate is 0.2～0.4 m·s-1, the increase of flow rate has no obvious effect on the change of water flow state. When the return pipe is arranged at the end of lateral to increase flow velocity, the number of particles outflow from emitter is reduced by about 30%. When the flow rate of return pipe is 0.1 m·s-1, the irrigation period of three kinds of emitter was improved by 50%, 38% and 41% respectively. These results indicate that to improve the flow rate of lateral can significantly improve the transport capacity of sand, increase the running time of drip irrigation system, reduce the requirements for water treatment facilities. |
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