等环量修正因子对轴流泵性能的影响
发布时间：2018-11-02 12:15
【摘要】：采用等环量扭曲规律设计的轴流泵叶片扭曲度大,在小流量工况下易造成根部冲角过大,使轴流泵效率明显下降。通过叶根侧等环量修正因子改变叶轮的几何形状,提高流动效率;并通过CFD数值计算验证改进的叶轮模型。研究结果发现,叶根侧环量修正因子的变化对轴流泵叶轮效率、扬程影响显著。减小叶根侧等环量因子,可以提高低流量工况的效率;但会使得大流量工况效率急剧恶化。对于研究的轴流泵模型,叶根处的等环量修正因子在0.3~0.55内较为适宜。
[Abstract]:The axial flow pump blade designed by the law of equal annular volume distortion has a large twist degree, which is easy to cause too large an angle of attack at the root under the condition of small flow rate, and the efficiency of the axial flow pump is obviously reduced. The geometric shape of the impeller is changed by the equal-ring correction factor of the blade root side, and the flow efficiency is improved, and the improved impeller model is verified by CFD numerical calculation. The results show that the change of the side ring correction factor has a significant effect on the impeller efficiency and head of the axial flow pump. The efficiency of low flow condition can be improved by reducing the equal circulation factor of blade root side, but the efficiency of large flow condition will deteriorate sharply. For the model of axial flow pump studied, the equal-loop correction factor at the root of the blade is in the range of 0.3 ~ 0.55.
【作者单位】： 海军装备部;上海理工大学能源与动力工程学院;
【基金】：上海市科委科研计划项目(13DZ2260900)资助
【分类号】：TH312
[Abstract]:The axial flow pump blade designed by the law of equal annular volume distortion has a large twist degree, which is easy to cause too large an angle of attack at the root under the condition of small flow rate, and the efficiency of the axial flow pump is obviously reduced. The geometric shape of the impeller is changed by the equal-ring correction factor of the blade root side, and the flow efficiency is improved, and the improved impeller model is verified by CFD numerical calculation. The results show that the change of the side ring correction factor has a significant effect on the impeller efficiency and head of the axial flow pump. The efficiency of low flow condition can be improved by reducing the equal circulation factor of blade root side, but the efficiency of large flow condition will deteriorate sharply. For the model of axial flow pump studied, the equal-loop correction factor at the root of the blade is in the range of 0.3 ~ 0.55.
【作者单位】： 海军装备部;上海理工大学能源与动力工程学院;
【基金】：上海市科委科研计划项目(13DZ2260900)资助
【分类号】：TH312
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