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預(yù)旋調(diào)節(jié)對(duì)離心泵空化影響的試驗(yàn)與數(shù)值模擬
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國(guó)家自然科學(xué)基金資助項(xiàng)目（51209217）和中國(guó)石油創(chuàng)新基金資助項(xiàng)目（2012D-5006-0611）


Experimental and Numerical Investigations of Cavitation in a Centrifugal Pump with Pre-whirl Regulation
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    摘要:

    為探究前置導(dǎo)葉不同預(yù)旋角度對(duì)離心泵空化性能的影響規(guī)律，對(duì)帶有自主設(shè)計(jì)前置導(dǎo)葉的IS 150-125-250型離心泵進(jìn)行了空化性能試驗(yàn)，選用Zwart-Gerber-Belamri空化模型進(jìn)行3D非穩(wěn)態(tài)全流道空化流動(dòng)數(shù)值模擬，結(jié)果表明：在一定的角度范圍內(nèi)，負(fù)預(yù)旋調(diào)節(jié)可以改善離心泵的空化性能，但超過(guò)某一角度后，空化性能將快速惡化；正預(yù)旋調(diào)節(jié)會(huì)惡化離心泵的空化性能，正預(yù)旋角度越大，惡化程度越明顯。對(duì)不同預(yù)旋角度下葉輪內(nèi)空泡率分布規(guī)律的分析發(fā)現(xiàn)，一定范圍內(nèi)的負(fù)預(yù)旋角會(huì)減小葉輪內(nèi)空化區(qū)域，正預(yù)旋會(huì)增大葉輪內(nèi)空化區(qū)域。

    Abstract:

    With the aim to explore the influence of inlet guide vane on the cavitation performance of centrifugal pump, the cavitation experiment on IS 150-125-250 centrifugal pumps with original design inlet guide vane has been conducted. Using the Zwart-Gerber-Belamri cavitation model, the 3D unsteady cavitation flow in centrifugal pump flow channels has been simulated. The result shows that the negative pre-whirl by guide vane regulation could improve the cavitation performance of centrifugal pump in a certain angle range, and the cavitation performance was deteriorated when the angle exceeds the certain value. The positive pre-whirl regulation deteriorated the cavitation performance of centrifugal pump, and it become even more serious with the increasing positive pre-whirl angle. The analysis of the vapor volume fraction distribution in impeller channels indicates that the negative pre-whirl angle reduced the cavitation zones in impeller, and the positive pre-whirl angle expanded the cavitation zones in impeller channels.

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張永學(xué),宋鵬飛,許 聰,田 原,張金亞.預(yù)旋調(diào)節(jié)對(duì)離心泵空化影響的試驗(yàn)與數(shù)值模擬[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2014,45(9):131-137. Zhang Yongxue, Song Pengfei, Xu Cong, Tian Yuan, Zhang Jinya. Experimental and Numerical Investigations of Cavitation in a Centrifugal Pump with Pre-whirl Regulation[J]. Transactions of the Chinese Society for Agricultural Machinery,2014,45(9):131-137.

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  • 收稿日期:2014-03-11
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  • 在線發(fā)布日期: 2014-09-10
  • 出版日期: 2014-09-10