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迷宮流道偏差量對(duì)灌水器水力性能及抗堵塞性能的影響
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國(guó)家高技術(shù)研究發(fā)展計(jì)劃（863計(jì)劃）資助項(xiàng)目（2011AA100507）


Influence of the Offset of Labyrinth Channels of Drip Emitters on Hydraulic and Anti-clogging Performance
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    摘要:

    以齒尖偏差量分別為-0.25、0、0.25和0.50mm的齒形流道結(jié)構(gòu)形式的灌水器為研究對(duì)象，應(yīng)用CFD單相流流場(chǎng)速度數(shù)值分析、CFD兩相流沙粒濃度分布數(shù)值分析、試驗(yàn)樣品清水和渾水測(cè)試相結(jié)合的方法，研究了偏差量對(duì)灌水器水力性能和抗堵塞能力的影響。結(jié)果表明：偏差量與流態(tài)指數(shù)呈正相關(guān)關(guān)系，與流量系數(shù)呈負(fù)相關(guān)關(guān)系，而隨著偏差量的增加灌水器的抗堵塞能力也在下降，綜合分析偏差量對(duì)水力性能和抗堵塞性能的影響，認(rèn)為在滿足流態(tài)指數(shù)的要求下應(yīng)盡量減小偏差量以提高抗堵塞能力。

    Abstract:

    The influence of offsets (-0.25mm, 0, 0.25mm, 0.50mm) of dental labyrinth channels of drip emitters on hydraulic and anti-clogging performance was studied by the following methods: there were numerical simulations carried out for the liquid-phase flow and the liquid-solid two-phase flows in the flow field by the CFD program Fluent, and the samples were tested. The obtained results showed positive relationship between offset and discharge coefficient, and negative relationship between offset and flow state exponent. With the increasing of the offset of emitters, the anti-clogging ability declined. Thus, combining the hydraulic and anti-clogging performance, under the condition of adequate flow state exponent, it put forward a suggestion that reducing the offset as much as possible to enhance the anti-clogging performance.

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喻黎明,吳普特,牛文全.迷宮流道偏差量對(duì)灌水器水力性能及抗堵塞性能的影響[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2011,42(9):64-68,73. Yu Liming, Wu Pute, Niu Wenquan. Influence of the Offset of Labyrinth Channels of Drip Emitters on Hydraulic and Anti-clogging Performance[J]. Transactions of the Chinese Society for Agricultural Machinery,2011,42(9):64-68,73.

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