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| Analysis of vortex action in perforated emitter under different working pressures |
| XING Shaobo1,2, ZHANG Jinzhu1,2*, WANG Zhenhua1,2, LIU Ningning1,2 |
| 1. College of Water Conservancy and Architectural Engineering, Shihezi University, Shihezi, Xinjiang 832000, China; 2. Key Laboratory of Modern Water Saving Irrigation Corps, Shihezi, Xinjiang 832000, China |
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Abstract In order to explore the influence of vortex in perforated channel on anti-clogging and energy dissipation performance of emitters, based on the numerical simulation method verified by experiments, the flow field distribution, geometric characteristics of vortex zone, vortex intensity and pressure distribution in four kinds of working pressure channels were analyzed, and the movement of sediment particles with different particle sizes in the emitter was also analyzed. The results show that the vortex zone can continuously wash and clean the side wall of the channel and slow down the accumulation of particles in the perforated channel, and the vortex zone can play an anti-clogging role. The friction between different flow velocity layers, vortex zone and main flow zone, and vortex zone and channel side wall in the vortex zone will consume energy, and the vortex zone can play an energy dissipation role. The vortex can exist stably under different working pressures. The above analysis shows that the vortex zone exists stably under different working pressures, and can improve the anti-clogging and energy dissipation performance of drip irrigation emitters, which can provide reference for anti-clogging and hydraulic performance optimization of emitters.
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Received: 08 July 2020
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