阻力
叶轮
离心泵
湍流
机械
材料科学
离心风机
比转速
流量(数学)
还原(数学)
旋转动力泵
压力梯度
边界层
物理
机械工程
螺杆泵
变量泵
工程类
几何学
径向柱塞泵
数学
入口
作者
Baoling Cui,Zhen Wang,Ying-Bin Zhang,Xiaotian Han
标识
DOI:10.1142/s0217984921506119
摘要
To improve the performance of a low-specific-speed centrifugal pump, the bionic structure extracted from the dung beetle was distributed on the blade surface to reduce the drag. The flow fields in the centrifugal pumps with and without the bionic structure blade were calculated based on the RNG [Formula: see text]–[Formula: see text] turbulence model. The results showed that the bionic structure can reduce the energy loss and improve the hydraulic efficiency of the centrifugal pump, with a maximum increase of 5%. The bionic structure can affect the turbulence structure of the boundary layer near the wall and reduce the blade outlet velocity gradient and wall shear, thereby improving the pressure pulsation characteristics of the centrifugal pump. With the increase in flow, the drag reduction gradually becomes evident for the impeller with a bionic structure.
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