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蝸殼式離心泵內(nèi)部非定常數(shù)值計(jì)算與分析
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國(guó)家自然科學(xué)基金資助項(xiàng)目（51279069）、江蘇高校科研成果產(chǎn)業(yè)化推進(jìn)項(xiàng)目（JHB 2012-38）和江蘇高校優(yōu)勢(shì)學(xué)科建設(shè)工程資助項(xiàng)目


Numerical Calculation and Analysis of Inner Unsteady Flow for Volute Centrifugal Pump
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    摘要:

    為研究設(shè)計(jì)工況下蝸殼式離心泵內(nèi)部瞬態(tài)流動(dòng)的狀態(tài)和規(guī)律，基于高質(zhì)量結(jié)構(gòu)化網(wǎng)格和快速成型技術(shù)，利用商業(yè)計(jì)算軟件CFX對(duì)某型號(hào)蝸殼式離心泵進(jìn)行了全流場(chǎng)非定常數(shù)值模擬。通過與定常數(shù)值模擬結(jié)果及試驗(yàn)結(jié)果比較，表明非定常數(shù)值模擬能夠更為準(zhǔn)確地預(yù)測(cè)蝸殼式離心泵的性能參數(shù)，其中揚(yáng)程最大偏差在4%以內(nèi)，效率最大偏差在3%以內(nèi)。受葉輪-蝸殼耦合作用影響，蝸殼式離心泵內(nèi)部壓力脈動(dòng)周期性明顯，監(jiān)測(cè)點(diǎn)壓力脈動(dòng)主頻均為葉片通過頻率。非定常下的壓力場(chǎng)表明，各葉輪流道進(jìn)口及中間位置的壓力分布相近，靠近葉輪出口的壓力分布差異明顯；蝸殼內(nèi)部存在明顯的二次流動(dòng)現(xiàn)象，并且隨主流運(yùn)動(dòng)向前發(fā)展。

    Abstract:

    In order to study the flow characteristics in centrifugal pump at design condition, the inner unsteady flow was simulated based on high-quality structured grid and rapid prototyping technology by using the commercial software CFX．The results indicate that the method of unsteady numerical simulation can accurately predict the performance parameters of the centrifugal pump with the test. The maximum deviation of head and efficiency are less than 4% and 3%, respectively. Impacted by the impeller-volute coupling, the pressure pulsation in volute centrifugal pump has strong periodicity, and the basic frequency is the blade passing frequency. There is a similar pressure field between the impeller passage inlet and the middle of impeller passage, but the pressure distribution near the impeller outlet has a significant difference. Significant secondary flow phenomena exist in the volute and move forward with the mainstream.

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施衛(wèi)東,徐 磊,王 川,陸偉剛,周 嶺.蝸殼式離心泵內(nèi)部非定常數(shù)值計(jì)算與分析[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2014,45(3):49-53. Shi Weidong, Xu Lei, Wang Chuan, Lu Weigang, Zhou Ling. Numerical Calculation and Analysis of Inner Unsteady Flow for Volute Centrifugal Pump[J]. Transactions of the Chinese Society for Agricultural Machinery,2014,45(3):49-53.

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  • 收稿日期:2013-04-24
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  • 在線發(fā)布日期: 2014-03-10
  • 出版日期: 2014-02-10