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離心泵內(nèi)部動(dòng)靜干涉作用的數(shù)值模
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Simulation of Unsteady Flow in a Centrifugal Pump
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    摘要:

    采用壓力邊界條件對(duì)一單級(jí)單吸蝸殼式離心泵進(jìn)行了三維非定常數(shù)值模擬計(jì)算,，模擬過(guò)程中給定離心泵入口總壓和出口靜壓，結(jié)合滑移網(wǎng)格技術(shù),，成功地捕捉了葉輪—蝸殼的動(dòng)靜干涉作用引起的非定常流動(dòng)特性,。計(jì)算結(jié)果表明，離心泵內(nèi)流場(chǎng)周期性脈動(dòng)明顯,，蝸殼內(nèi)靜壓及葉片載荷分別以葉片旋轉(zhuǎn)頻率、葉輪旋轉(zhuǎn)頻率發(fā)生周期性變化,。蝸殼幾何形狀的不對(duì)稱(chēng)性影響了動(dòng)靜干涉作用在離心泵內(nèi)部的傳播,，引起了離心泵內(nèi)流動(dòng)沿周向分布不均勻現(xiàn)象。

    Abstract:

    Pressure boundary condition was used to investigate the unsteady 3-D flow characteristics in a single-stage single-suction centrifugal pump with vaneless volute. For the calculation, the total pressure and the static pressure were specified for inlet and outlet respectively, and the sliding mesh technique was used. The results show the capability of this numerical method in capturing the unsteady flow characteristics due to the impeller-volute interaction. The flow is characterized by periodic pulsation, blade passing frequency in volute and impeller rotating frequency in impeller. To a large extent, the asymmetric shape of the volute affects the propagation of impeller-volute interaction and results in the circumferential non-uniformity flow distribution in the pump. 

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田輝,郭濤,孫秀玲,李國(guó)君.離心泵內(nèi)部動(dòng)靜干涉作用的數(shù)值模[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2009,40(8):92-95. Simulation of Unsteady Flow in a Centrifugal Pump[J]. Transactions of the Chinese Society for Agricultural Machinery,2009,40(8):92-95.

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