| 引用本文: | 陶娟琴,陶洪飞,李 巧,等.单翼迷宫式滴灌带进出水口数、梯形流道齿数对抗堵塞性能的影响[J].灌溉排水学报,2023,42(9):53-60. |
| TAO Juanqin,TAO Hongfei,LI Qiao,et al.单翼迷宫式滴灌带进出水口数、梯形流道齿数对抗堵塞性能的影响[J].灌溉排水学报,2023,42(9):53-60. |
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| 摘要: |
| 【目的】研究进水口数、梯形流道齿数、出水口数对单翼迷宫式滴灌带抗堵塞性能的影响。【方法】采用物理试验、数值模拟、建立线性数学模型等方法，设计9组工况进行数值模拟，研究额定流量为1.8 L/h的单翼迷宫式滴灌带的水沙两相流流场，以及滴灌带不同进出水口数、梯形流道齿数对流态指数、流量系数的影响。【结果】SST k-ω两方程低雷诺数紊流模型更加适用于单翼迷宫式滴灌带流场的数值模拟；从进水口到梯形流道再到出水口，泥沙颗粒质量浓度逐渐变小；滴灌带第5进水口为主要进水口，第3出水口为主要出水口；进水口数、梯形流道齿数、出水口数对流态指数影响极小，对流量系数的影响显著性排序为梯形流道齿数＞出水口数＞进水口数；构建了流量系数与三因素之间的多元线性模型，该模型决定系数为0.987，精度较好。【结论】在梯形迷宫流道尺寸相同时，梯形流道齿数越少流道内部流速越大，更有利于泥沙颗粒排出流道。构建的流量系数与三因素的公式可实现出水口位置精准灌溉植物，合理利用土地资源。 |
| 关键词: 单翼迷宫式滴灌带；SST k-ω紊流模型；水沙两相流；进水口数；梯形流道齿数；出水口数 |
| DOI：10.13522/j.cnki.ggps.2023053 |
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| Effects of the Number of Inlet and Outlet Ports and Trapezoidal Channel Teeth on Anti-clogging Performance of a Single-wing Labyrinth Drip Irrigation Belt |
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TAO Juanqin, TAO Hongfei, LI Qiao, LIU Yao, ZHANG Hui, MAHEMUJIANG·Aihemat, JIANG Youwei, YANG Wenxin
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1. School of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi 830052, China;
2. Xinjiang Key Laboratory of Water Conservancy Engineering Safety and Water Disaster Prevention, Urumqi 830052, China
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| Abstract: |
| 【Objective】This paper is to study the effects of the number of water inlets, the number of teeth of the trapezoidal flow channel and the number of outlets on the anti-clogging performance of the single-wing labyrinth drip irrigation belt. We designed nine groups of working conditions for numerical simulation.【Method】Physical experiments, numerical simulations, linear mathematical models were used to study water and sand flow in a single-wing labyrinth drip irrigation belt when the flow rate was 1.8 L/h, as well as the influence of different inlet and outlet numbers and trapezoidal flow channel teeth on the flow index and flow coefficient of the drip irrigation belt.【Result】The SST k-ω two-equation for low Reynolds number turbulence model is more suitable for numerical simulation of flow field in the single-wing labyrinth drip irrigation belt. From the inlet to the trapezoidal channel and then to the outlet, the mass concentration of sediment particles gradually decreases; the fifth water inlet of drip irrigation belt is the main water inlet, and the third water outlet is the main water outlet; the number of water inlets, trapezoidal channel teeth, and the number of water outlets have a minimal impact on flow regime index; the their impact on the flow coefficient is ranked in the order of trapezoidal channel teeth>number of water outlets>number of water inlets; a multivariate linear model between the flow coefficient and the three factors was constructed, with a decision coefficient being 0.987.【Conclusion】When the size of the trapezoidal labyrinth flow path is the same, the smaller the number of teeth in the trapezoidal flow path was, the greater the internal flow velocity in the flow path would be. This facilitates discharge of sediment particles from the flow path. The constructed flow coefficient and three factor formula can achieve accurate irrigation at the outlet location, making reasonable use of land resources. |
| Key words: single-wing labyrinth drip irrigation belt; SST k-ω turbulence model; the two-phase flow of water and sand; number of water inlets; trapezoidal channel teeth; number of water outlets |
