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流固耦合作用對螺旋離心泵流場影響的數(shù)值分析
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國家自然科學(xué)基金資助項目(51009072);江蘇省自然科學(xué)基金創(chuàng)新學(xué)者攀登項目(BK2009006);江蘇高校優(yōu)勢學(xué)科建設(shè)工程資助項目


Numerical Analysis for Effect of Fluid-structure Interaction on Flow Field in Screw Centrifugal Pump
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    摘要:

    為研究流固耦合作用對螺旋離心泵內(nèi)部流場的影響,,以ZJ200—25型螺旋離心泵為研究對象,應(yīng)用計算流體力學(xué)軟件CFX12.1和有限元軟件ANSYS Workbench對螺旋離心泵進(jìn)行了考慮內(nèi)部流場和結(jié)構(gòu)相互作用的兩場交替聯(lián)合求解,,并以相同的設(shè)置對不考慮流固耦合作用的內(nèi)部流場進(jìn)行了計算,。對比分析兩種計算方法得到的流場發(fā)現(xiàn),考慮流固耦合作用后:泵進(jìn)口處的壓力波動加劇,,出口壓力波動強(qiáng)度降低,,進(jìn)出口波動頻率不變,但相位有改變,;速度分布滿足共同的規(guī)律,,但在小流量工況下差別最大,同時在葉片與隔舌處于相干位置時,,隔舌附近流動也受到明顯影響,;徑向力大小隨時間變化規(guī)律一致,但波動范圍減??;考慮流固耦合作用后葉輪流道內(nèi)流動更加不對稱。

    Abstract:

    In order to analyze the effect of fluid-structure interaction (FSI) on flow field in screw centrifugal pump, a ZJ200—25 screw type centrifugal pump with double screw blades was chosen as the study subject. The two-way coupling method was established to study the effect of FSI of impeller on flow field in screw centrifugal pump. CFX12.1 and ANSYS Workbench were used to the combined calculation for turbulent flow and structure response of impeller. And the unsteady flow field of the pump was simulated numerically under several operating conditions without effect of FSI. Compared the result of the two calculation methods, it’s found that, with the effect of FSI, pressure fluctuations in pump inlet intensified. The dominant frequency of pressure in inlet and outlet do not change but the phase position was different after FSI. The inner velocity distributions satisfy the common characteristic, but the largest differences were appeared under the condition of small flow rate. The flow field near volute tongue was affected by FSI most obviously when blades passing by the tongue. Magnitude of radial trust changing with time has similar regularities, but the fluctuation range with FSI method was reduced. Flow filed in impeller was more dissymmetrical under the effect of fluid-structure interaction. The conclusion obtained in this investigation will provide an essential guide to analyze the inner flow filed and master characteristics of rotor vibration characters and inducing factors of the pressure fluctuation in the screw type centrifugal pump.

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袁壽其,徐宇平,張金鳳,裴吉,周建佳.流固耦合作用對螺旋離心泵流場影響的數(shù)值分析[J].農(nóng)業(yè)機(jī)械學(xué)報,2013,44(1):38-42,47. Yuan Shouqi, Xu Yuping, Zhang Jinfeng, Pei Ji, Zhou Jianjia. Numerical Analysis for Effect of Fluid-structure Interaction on Flow Field in Screw Centrifugal Pump[J]. Transactions of the Chinese Society for Agricultural Machinery,2013,44(1):38-42,47.

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  • 在線發(fā)布日期: 2012-12-31
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