【摘要】：為研究顆粒體積分數(shù)對深海采礦提升泵工作性能影響,采用RNGκ-ε湍流模型與Hinze-Tchen顆粒湍流粘性系數(shù)模型,對提升泵內固液兩相流進行數(shù)值模擬,比較不同的顆粒體積分數(shù)對提升泵內壓力、顆粒濃度分布的影響,進而分析顆粒體積分數(shù)對揚程、效率等工作性能的影響,為提升泵的優(yōu)化設計提供理論依據(jù)。研究結果表明:隨著顆粒體積分數(shù)的增加,泵內漿體總壓逐漸下降,揚程隨之減小,葉片與導葉表面上平均顆粒濃度均有一定幅度的上升,顆粒與葉片、導葉表面之間以及顆粒間的碰撞幾率增大,流體運動趨向更加復雜,流動更加絮亂,因而加大水力損失,降低泵的效率。實驗表明數(shù)值模擬與實驗結果基本吻合,證實了數(shù)值模擬方法的可行性及準確性。
[Abstract]:In order to study the effect of particle volume fraction on the performance of deep-sea mining lifting pump, the RNG 魏-蔚 turbulence model and the Hinze-Tchen particle turbulence viscosity model were used to simulate the solid-liquid two-phase flow in the lifting pump. The effects of different particle volume fraction on the pressure and particle concentration distribution in the lifting pump were compared, and the effects of particle volume fraction on the lift and efficiency were analyzed, which provided the theoretical basis for the optimization design of the lifting pump. The results show that with the increase of particle volume fraction, the total pressure of the slurry decreases gradually, the lift decreases, and the average particle concentration on the surface of the blade and the guide vane increases to a certain extent. The collision probability between the surfaces of the guide vane and the particles increases, the fluid movement tends to be more complex and the flow is more chaotic, so the hydraulic loss is increased and the efficiency of the pump is reduced. The experimental results show that the numerical simulation is in good agreement with the experimental results, and the feasibility and accuracy of the numerical simulation method are verified.
【作者單位】： 中南大學機電工程學院;中南大學高性能復雜制造國家重點實驗室;
【基金】：國家自然科學基金(51375498) 教育部博士點基金資助項目(20130162110004)
【分類號】：TD50

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