【摘要】：為充分探究離心泵作透平專用葉輪葉片進口安放角的確定方法,該文建立了液力透平專用葉輪葉片進口安放角與設(shè)計流量的關(guān)系表達式;基于ANSYS Blade Gen與NX軟件,分別設(shè)計了4個不同葉片進口安放角的透平專用葉輪;在試驗驗證基礎(chǔ)上,通過全流場數(shù)值計算,分析了葉片進口安放角對透平外性能的影響。結(jié)果表明:葉片進口安放角從60°增大到72°、90°和105°時,透平高效點對應(yīng)的流量分別為85、90、100和110 m3/h,4臺透平數(shù)值計算最高效率點流量與理論計算設(shè)計流量基本吻合,表明采用該文推導(dǎo)的設(shè)計流量與進口安放角的關(guān)系式合理。外特性性能曲線顯示隨葉片進口安放角增大,透平高效點向大流量偏移,最高效率值有所下降,且下降的速率增大。綜合考慮透平最高效率及高效區(qū)范圍,對于比轉(zhuǎn)速為193蝸殼式單級單吸離心泵反轉(zhuǎn)作透平,葉片進口安放角宜設(shè)計在60°與90°之間。該研究可為液力透平專用葉輪設(shè)計提供參考。
[Abstract]:In order to fully explore the method of determining the inlet angle of impeller blade for centrifugal pump, this paper establishes the expression of the relation between the inlet angle of impeller blade and the design flow rate, based on the software of ANSYS Blade Gen and NX. Four special turbine impellers with different blade inlet placement angles were designed, and the effect of blade inlet placement angle on turbine performance was analyzed by numerical calculation of the whole flow field on the basis of experimental verification. The results show that when the inlet angle of blade is increased from 60 擄to 72 擄, 90 擄and 105 擄, the flow rate corresponding to the high efficiency point of turbine is 85,90100 and 110 m3 / h respectively. The maximum efficiency point flow rate is in good agreement with the theoretical design flow rate. It shows that the relationship between the design flow rate and the inlet angle is reasonable. The external performance curve shows that with the increase of the blade inlet angle, the turbomachine high efficiency point shifts to the large flow rate, the maximum efficiency value decreases, and the decreasing rate increases. Considering the maximum efficiency of turbine and the range of high efficiency region, the turbine is designed between 60 擄and 90 擄when the specific speed is 193 volute single-stage suction centrifugal pump inversion, and the blade inlet angle should be designed between 60 擄and 90 擄. The research can provide reference for the design of special impeller for hydraulic turbine.
【作者單位】： 江蘇大學(xué)流體機械工程技術(shù)研究中心;西華大學(xué)能源與動力工程學(xué)院流體及動力機械教育部重點實驗室;成都瀚能精密機械有限責(zé)任公司;
【基金】：國家自然科學(xué)基金資助項目(11602097、51379179) 江蘇省普通高校研究生科研創(chuàng)新計劃資助項目(CXZZ13-0678) 四川省教育廳重大培育項目
【分類號】：TH311

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