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Open AccessArticle

Numerical Investigation of the Turbulent Wake-Boundary Interaction in a Translational Cascade of Airfoils and Flat Plate

1
State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, China
2
School of Engineering, Zhejiang University City College, Hangzhou 310015, China
3
Institute of Process Equipment, Zhejiang University, Hangzhou 310027, China
*
Author to whom correspondence should be addressed.
Energies 2020, 13(17), 4478; https://doi.org/10.3390/en13174478
Received: 24 July 2020 / Revised: 21 August 2020 / Accepted: 27 August 2020 / Published: 31 August 2020
(This article belongs to the Special Issue Engineering Fluid Dynamics 2019-2020)
Rotor stator interaction (RSI) is an important phenomenon influencing performances in the pump, turbine, and compressor. In this paper, the correlation-based transition model is used to study the RSI phenomenon between a translational cascade of airfoils and a flat plat. A comparison was made between computational results and experimental results. The computational boundary layer velocity is in reasonable agreement with the experimental velocity. The thickness of boundary layer decreases as the RSI frequency increases and it increases as the fluid flows downstream. The spectral plots of velocity fluctuations at leading edge x/c = 2 under RSI partial flow condition f = 20 Hz and f = 30 Hz are dominated by a narrowband component. RSI frequency mainly affects the turbulence intensity in the freestream region. However, it has little influence on the turbulence intensity of boundary layer near the wall. A secondary vortex is induced by the wake–boundary layer interaction and it leads to the formation of a thickened laminar boundary layer. The negative-vorticity wake also facilitates the formation of a thickened boundary layer while the positive-vorticity wake has a similar effect, like a calmed region which makes the boundary layer thinner. View Full-Text
Keywords: rotor stator interaction; boundary layer; secondary vortex rotor stator interaction; boundary layer; secondary vortex
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MDPI and ACS Style

Ruan, X.; Zhang, X.; Wang, P.; Wang, J.; Xu, Z. Numerical Investigation of the Turbulent Wake-Boundary Interaction in a Translational Cascade of Airfoils and Flat Plate. Energies 2020, 13, 4478. https://doi.org/10.3390/en13174478

AMA Style

Ruan X, Zhang X, Wang P, Wang J, Xu Z. Numerical Investigation of the Turbulent Wake-Boundary Interaction in a Translational Cascade of Airfoils and Flat Plate. Energies. 2020; 13(17):4478. https://doi.org/10.3390/en13174478

Chicago/Turabian Style

Ruan, Xiaodong; Zhang, Xu; Wang, Pengfei; Wang, Jiaming; Xu, Zhongbin. 2020. "Numerical Investigation of the Turbulent Wake-Boundary Interaction in a Translational Cascade of Airfoils and Flat Plate" Energies 13, no. 17: 4478. https://doi.org/10.3390/en13174478

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