可调叶片高比转速混流泵内部流场数值模拟

运用商用软件Fluent,采用雷诺时均N-S方程、标准k-ε湍流模型、流体机械模型中的多重参考坐标系模型（MRF）,对不同安放角的3个高比转速混流泵模型进行了数值模拟与结果分析.主要分析了设计工况下0°安放角的模型叶轮进口最高点截面的绝对速度和静压分布.详细分析和比较了3个模型的叶片压力面静压分布云图、叶片压力面相对速度分布云图、导叶压力面静压分布云图,捕捉到了安放角为＋4°时叶片进口接近轮缘处流体撞击轮缘形成的小回流.简要分析了安放角为0°的模型泵导叶压力面相对速度分布,可知导叶充分发挥了其转能与消除环量的作用.分析结果揭示了高比转速混流泵内部流动规律.

Numerical simulation for adjustable high specific speed mixed-flow pump

Three kinds of adjustable high specific speed mixed-flow pump were simulated by using commercial software Fluent. Reynolds time-averaged N -S equations and the standard k-ε turbulent model were adopted. Multiple reference frame model of rotating fluid mechanical model was used. Absolute velocity and static pressure distribution of the cross-section of the highest point at entrance of blade of O riding angle model were mainly analyzed. Relative velocity and static pressure of the pressure surface of the impeller and static pressure of guide blade were also analyzed and compared. The impact phenomenon at back flow of ＋ 4 riding angle was captured. Relative velocity of pressure surface of guide blade of O riding angle was analyzed. In the result, guide blade sufficiently displays its function of energy conversion and anti-circulation. The interior flow of high specific speed mixed-flow pump was revealed by the results of the analysis.