Numerical study of flow characteristics of the blade with different structures

In order to study the effect of blade structures on the induced excitation characteristics, two different structures are investigated, which are the blade with special trailing edge and the staggered blade. Firstly, based on the steady numerical simulation, the time-averaged velocity and pressure di...

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Bibliographic Details
Published in:Journal of physics. Conference series 2021-08, Vol.1986 (1), p.12136
Main Authors: Li, Guoping, Ma, Zhenlai, Chen, Biwen, Chen, Changsheng, Chen, Laizuo, Gao, Bo
Format: Article
Language:English
Subjects:
Computational fluid dynamics
Flow characteristics
Fluid flow
Low noise
Pressure distribution
Stress concentration
Vortex shedding
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Summary:In order to study the effect of blade structures on the induced excitation characteristics, two different structures are investigated, which are the blade with special trailing edge and the staggered blade. Firstly, based on the steady numerical simulation, the time-averaged velocity and pressure distribution are obtained at different Re numbers (5×10 3 and 1×10 4 ). Secondly, the unsteady numerical simulation method LES is applied to acquire the transient and complex flow field around the blade. It is found that both two blade structures significantly change the flow characteristics around the blade, especially in the wake flow region. The evident frequency is observed from the frequency spectrums. It is clear that the dominant frequency is originated from the vortex shedding, which is similar to the Karmen vortex street. Finally, the results will be useful for the design of blade with low noise purpose.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1986/1/012136