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泵站虹吸式出水管虹吸形成過(guò)程氣液兩相流數(shù)值模擬
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國(guó)家自然科學(xué)基金資助項(xiàng)目(51009051)和上海市力學(xué)在能源工程中的應(yīng)用重點(diǎn)實(shí)驗(yàn)室開(kāi)放基金資助項(xiàng)目


Numerical Simulation for Two-phase Flow of Siphon Outlet in Pumping Station
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    摘要:

    為分析虹吸式出水管虹吸形成過(guò)程中氣液兩相流動(dòng)，基于各向同性假設(shè)，采用歐拉多相流模型與RNG k-ε湍流模型對(duì)一泵站虹吸式出水管虹吸過(guò)程中的氣液兩相流進(jìn)行了數(shù)值模擬。結(jié)果表明：虹吸過(guò)程中，在虹吸管駝峰段和下降段易產(chǎn)生上、下氣囊，對(duì)虹吸作用的完成有不利影響。來(lái)流流量是影響虹吸形成時(shí)間的主要因素，水力驅(qū)氣階段和水力挾氣階段可分別用不同的冪函數(shù)來(lái)表達(dá)時(shí)間與流量的關(guān)系。

    Abstract:

    In order to understand the characteristic of the gas-liquid two-phase flow in siphon pipe, based on the homogeneous model in multiphase flow theory of ANSYS CFX software and RNG kεturbulence model, the process of gas-liquid flow for a siphon outlet pipe in pumping station was simulated. Results of simulation showed that the air sacs are easily generated on the shell of siphon pipe when the gas mixed into the water and it has an extremely adverse influence with the siphon finish. Meanwhile, flow rate of the incoming flow is the main factor impacting the siphoning time. At last, the relations between the siphoning time and flow rate for hydraulic driving gas and mixing gas-water processes, according with the power function relationship, were given.

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王曉升,馮建剛,陳紅勛,卜立峰,譚琳露.泵站虹吸式出水管虹吸形成過(guò)程氣液兩相流數(shù)值模擬[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2014,45(5):78-83. Wang Xiaosheng, Feng Jiangang, Chen Hongxun, Bu Lifeng, Tan Linlu. Numerical Simulation for Two-phase Flow of Siphon Outlet in Pumping Station[J]. Transactions of the Chinese Society for Agricultural Machinery,2014,45(5):78-83.

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  • 收稿日期:2013-06-30
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  • 在線(xiàn)發(fā)布日期: 2014-05-10
  • 出版日期: 2014-05-10