Analytical Methods and Verification of Impeller Outlet Velocity Slip of Solid-Liquid Disc Pump with Multi-Type Blades
Analytical Methods and Verification of Impeller Outlet Velocity Slip of Solid-Liquid Disc Pump with Multi-Type Blades
复制标题
多型叶片固液盘泵叶轮出口速度转差分析方法及验证
DOI：
10.1007/s13369-020-04951-3
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发表时间：
2020
影响因子：
2.9
通讯作者：
Wang Guorong
中科院分区：
文献类型：
--
作者：
Pei Yingju;Liu Qingyou;Wang Chuan;Wang Guorong
深入探索提高速度滑移和理论扬程计算模型的精度，一直是水泵研究的重大课题。盘式泵不连续叶片不同于传统泵的连续叶片。盘式泵通过边界层的作用实现能量传递。为了填补目前叶片泵速度滑移和理论扬程研究的理论空白，对固液两相流下的速度滑移进行了系统的分析计算。在这项研究中，纠正了目前对速度滑移的误解。根据叶片表面颗粒与液体法向速度分量的不同，提出了进一步验证叶轮流道内固液两相流动速度差异的新方法。通过提出的圆周平均速度计算方法，给出并验证了直线叶片和弯曲叶片的螺杆泵的速度滑移系数和理论扬程的计算模型。计算模型的精度提高了39.4%。该模型在理论扬程计算中具有较好的应用价值，为进一步研究不同叶片形状盘式泵的能量转换、能效预测和逆向优化设计奠定了基础。
The intensive exploration to improve the accuracy of the calculation model of velocity slip and theoretical head has always been a major issue in pump research. Discontinuous blade of disc pump is different from the continuous blade of traditional pump. Disc pump realizes energy transfer by the effect of boundary layer. In order to fill in the theoretical blank of current research on the velocity slip and theoretical head of blade disc pump, the velocity slip is calculated by the systematic analysis under solid–liquid flow. In this study, the current misconception of velocity slip was corrected. Based on the different normal velocity components between particle and liquid on the blade surface, a new method is proposed to further verify the difference of solid–liquid flow velocity in impeller passage. Through the proposed method of calculating average circumferential velocity, the calculation model of the velocity slip coefficient and theoretical head of disc pump with linear and curved blade are given and verified. The accuracy of calculation model is increased by 39.4%. This model has good application value in theoretical head calculation, which lays a foundation for further research on energy conversion, energy efficiency prediction and reverse optimization design of disc pump with different blade shapes.