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前置導葉預旋調節(jié)離心泵性能的數(shù)值預測與試驗
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and Experiment of Inlet Guide Vane Pre-whirl Regulation for Centrifugal Pump
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    摘要:

    在分析葉輪進口流態(tài)的基礎上，給出了一種用于調節(jié)離心泵工況點的前置導葉水力模型設計方法，目的是通過減小離心泵在變工況條件下葉輪進口的沖擊損失和回流損失來改善在非設計工況的水力性能，拓寬高效運行范圍。基于SIMPLEC算法，通過數(shù)值求解Reynolds平均Navier-Stokes方程和RNG k-ε 湍流模型方程，模擬了不同預旋角度下前置導葉離心泵全流道的三維湍流流場，外特性計算結果和試驗數(shù)據(jù)吻合較好。在此基礎上，分析了離心泵前置導葉預旋調節(jié)的基本規(guī)律及調節(jié)機理。

    Abstract:

    Based on the analysis of fluid flow at the inlet of the impeller, one kind of hydraulic design method for inlet guide vane was proposed, used to adjust the operation point of centrifugal pump. The goal of the method lies in reducing the incidence loss and recirculation loss and improving the hydraulic performance for centrifugal pump at off-design condition. Based on the SIMPLEC algorithm, the Reynolds averaged Navier-Stokes equation and RNG k-ε turbulent model equation were solved. Then, the 3-D turbulent flow field of the centrifugal pump with inlet guide vane was simulated with the condition of various angles. Numerical results of operation performance are agreed well with the experimental date. Furthermore, the basic principle and mechanism of inlet guide vane pre-whirl regulation were analyzed.

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桂紹波,曹樹良,譚磊,祝寶山.前置導葉預旋調節(jié)離心泵性能的數(shù)值預測與試驗[J].農業(yè)機械學報,2009,40(12):101-106. and Experiment of Inlet Guide Vane Pre-whirl Regulation for Centrifugal Pump[J]. Transactions of the Chinese Society for Agricultural Machinery,2009,40(12):101-106.

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