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漩渦泵內(nèi)部不穩(wěn)定流場(chǎng)數(shù)值模擬
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國(guó)家自然科學(xué)基金資助項(xiàng)目（50509009）;“十一五”國(guó)家科技支撐計(jì)劃資助項(xiàng)目（2008BAF34B10）


Numerical Simulation of Internal Unsteady Flow in a Vortex Pump
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    摘要:

    為了研究漩渦泵內(nèi)部流場(chǎng)對(duì)其外特性的影響，采用RNG k—ε湍流模型和結(jié)構(gòu)化網(wǎng)格技術(shù)對(duì)漩渦泵內(nèi)部非定常流動(dòng)進(jìn)行數(shù)值模擬計(jì)算。結(jié)果表明，漩渦泵流道內(nèi)壓力變化呈直線分布；流道內(nèi)縱向漩渦隨流量的增大而減小，徑向漩渦周期性地脫離葉片被液流帶走且隨著時(shí)間增加而增大；設(shè)計(jì)工況下，各監(jiān)測(cè)點(diǎn)處壓力脈動(dòng)變化呈周期性分布，從流道進(jìn)口到出口壓力脈動(dòng)幅值逐步增大；不同工況下，葉片通過頻率是壓力脈動(dòng)的主頻，其對(duì)應(yīng)的壓力脈動(dòng)幅值隨流量增大而增大。

    Abstract:

    In order to study the vortex pump flow field characteristics of its external, it is necessary to carry out unsteady flow numerical simulation by using RNG k—ε turbulence model and structured grid inside the vortex pump. The results showed that the pressure changes within the linear distribution, with flow rate increasing, longitudinal vortex flow decreased, while the radial vortex flow periodically was removed from the leaves and increased with time. The pressure fluctuation at the different monitoring points was changed periodically at design condition. The pressure pulse amplitude increased from the entrance to the exit gradually. The blade passing frequency was dominative in the pressure fluctuation. With the flow rate increasing, pressure fluctuation was more obvious under the blade passing frequency.

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孔繁余,周水清,王志強(qiáng),胡俐,邱寧.漩渦泵內(nèi)部不穩(wěn)定流場(chǎng)數(shù)值模擬[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2011,42(1):44-48. Kong Fanyu, Zhou Shuiqing, Wang Zhiqiang, Hu Li, Qiu Ning. Numerical Simulation of Internal Unsteady Flow in a Vortex Pump[J]. Transactions of the Chinese Society for Agricultural Machinery,2011,42(1):44-48.

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