本文選題：潛水軸流泵 + 三維反問題設(shè)計方法�。� 參考：《農(nóng)業(yè)機(jī)械學(xué)報》2017年11期

【摘要】：對潛水軸流泵進(jìn)行三維反問題設(shè)計,以水力效率為設(shè)計目標(biāo),提出葉輪、導(dǎo)葉適合的載荷分布形式。通過正交試驗設(shè)計、單因素分析和數(shù)值模擬的方法研究載荷參數(shù)對潛水軸流泵內(nèi)外特性的影響,得到水力效率較優(yōu)的載荷分布形式:葉輪葉片為前載型,導(dǎo)葉葉片為輪轂中載、輪緣前載型。具體的載荷參數(shù)取值范圍:對于葉輪,斜率取值范圍為-1~0,前載點取值范圍為0.25~0.45,后載點取值范圍為0.55~0.75;對于導(dǎo)葉,輪轂斜率在0附近取值,輪緣斜率取值范圍為0~0.75,輪轂前載點取值范圍為0.25~0.45,輪緣前載點在0.25附近取值,輪轂后載點取值范圍為0.55~0.75。葉輪設(shè)計中發(fā)現(xiàn):前載型葉片對原泵葉根尾緣的二次流有改善作用。導(dǎo)葉設(shè)計中發(fā)現(xiàn):由于潛水軸流泵導(dǎo)葉的擴(kuò)散式結(jié)構(gòu)特點,導(dǎo)葉近壁面易出現(xiàn)分離渦,輪轂中載、輪緣前載型葉片能夠有效地抑制導(dǎo)葉近壁面的渦分離。
[Abstract]:Three-dimensional inverse problem design of submersible axial flow pump is carried out. The suitable load distribution form of impeller and guide vane is put forward with hydraulic efficiency as the design goal. By means of orthogonal design, single factor analysis and numerical simulation, the influence of load parameters on the internal and external characteristics of submersible axial flow pump is studied. The load distribution forms with better hydraulic efficiency are obtained: the impeller blade is the front load type, the guide vane is the wheel hub load, Flange front load type. The specific range of load parameters is as follows: for impeller, the slope range is -1 ~ 0, the range of pre-load point is 0.25 ~ 0.45, and the range of post-loading point is 0.55 ~ 0.75. For guide vane, the wheel hub slope is taken near zero. The slope range of wheel rim is 0 ~ 0. 75, the range of wheel hub load point is 0. 25 ~ 0. 45, the value of wheel front load point is near 0.25, and the value range of wheel hub rear load point is 0. 55 ~ 0. 75. In the design of impeller, it is found that the preloaded vane can improve the secondary flow of the root tail edge of the original pump. In the design of guide vane, it is found that due to the diffusive structure characteristics of the guide vane of the submersible axial flow pump, the separation vortex is easy to appear near the wall of the guide vane, and the vanes loaded in the hub and the front load vane of the wheel edge can effectively restrain the vortex separation near the wall of the guide vane.
【作者單位】： 中國農(nóng)業(yè)大學(xué)水利與土木工程學(xué)院;北京供水管網(wǎng)系統(tǒng)安全與節(jié)能工程技術(shù)研究中心;中國水利水電科學(xué)研究院;上海連成(集團(tuán))有限公司;
【基金】：“十二五”國家科技支撐計劃項目(2015BAD20B01)
【分類號】：TV136

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