The CFD simulations were carried out to study the power consumption and pumping performance of three traditional radial flow impellers—flat blade disc turbine, semi-circular disc turbine and asymmetric parabolic disc turbine BT (Bakker Turbine). The influence of various blades structure and size on the power number and pumping capacity of impellers was investigated. A novel impeller with annular sector paraboloid blades was designed and proposed. The stirring performance such as power number, pumping efficiency and axial projection area ratio between the new designed impellers and traditional impellers were compared. The results showed that increasing the vertex curvature of the blade outer edge would reduce the power number and improve the pumping efficiency. Reducing the axial height of the blade outer edge would also reduce the power number, but the pumping efficiency was not improved. The impeller FT (Fan-shaped Turbine) with a novel asymmetric annular sector paraboloid blade based on spatial free-form surface design showed the best operational performance. Compared with BT impeller, the power number of the fan-shaped turbine was decreased by 30.8%, the pumping efficiency was increased by 22.6%, and the axial projection area ratio of impeller was increased by 21.5%. The novel impeller would have a promising application in gas-liquid dispersion operations.
Dongdong SUN Zhiyong ZHENG Jing LI Xiaobei ZHAN Minjie GAO Yanan JIN
. Design of a Novel Radial Flow Impeller Based on CFD Simulation[J]. The Chinese Journal of Process Engineering, 2017
, 17(4)
: 677
-683
.
DOI: 10.12034/j.issn.1009-606X.217106
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