Correlation between the Internal Flow Pattern and the Blade Load Distribution of the Centrifugal Impeller

Machines

Zuchao Zhu¹  Xiaojun Li¹  Bo Chen¹  Xiaowu Chen¹ 

[1] Key Laboratory of Fluid Transmission Technology of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China;

关键词: centrifugal impeller;    blade load distribution;    particle image velocimetry (PIV);    internal flow patterns;    the mean absolute flow angle;   

DOI  :  10.3390/machines10010040

来源: DOAJ

【 摘 要 】

The blade load distributions reflect the working characteristics of centrifugal impellers, and the vortexes in the impeller channel affect the blade load distribution, but the mechanism of this phenomenon is still unclear. In this study, particle image velocimetry (PIV) was adopted to clarify the correlation between the internal flow pattern and the blade load distribution. The internal flow pattern and the blade load distribution were presented under different working conditions to study the influence of the internal flow pattern on the blade load. Results showed that the vortexes in the flow channel redistributed the blade load. The clockwise vortex made the position of the maximum blade load closer to the outlet, while the counterclockwise vortex had the opposite effect. Meanwhile, the vortexes caused the blade load distribution to be steeper, which reduced energy conversion efficiency. Moreover, the mean absolute flow angle was introduced to explain the mechanism of the effects of vortexes on blade load. The results can be used as a theoretical basis for the design of high-performance impellers.

【 授权许可】

Unknown