Research on Aerodynamic Design of an End Wall Based on a Quasi-3D Optimization Method

Tingsong Yan, Huanlong Chen, Zhiqian Wu, Yang Liu and Peigang Yan
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Tingsong Yan: School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Huanlong Chen: School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Zhiqian Wu: School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Yang Liu: School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
Peigang Yan: School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China

Energies, 2023, vol. 16, issue 4, 1-21

Abstract: To investigate the effects of different passage structures on the aerodynamic performance of the transonic fans, this paper develops a reliable and practical quasi-3D optimization method for the hub based on the experimental data of Stage 67. In the method, the hub profile of Stage 67 can be optimized without changing the geometrical data of the blades. The optimization results show that stream tube diffusion characteristics depend on the hub profile’s curvature in the boundary layer near the hub. In the front part of the hub, the end wall with a concave construction can enhance the expansion of the stream tubes near the root of the rotor blade, which helps control the diffusion flow of viscous fluid effectively to decrease the low-energy fluid’s energy degradation and radial secondary flow in the boundary layer. In the latter part of the hub, the end wall with a convex construction facilitates the shrinkage of stream tubes to decrease the secondary flow loss and separated flow loss by controlling the separation of the boundary layer efficiently. This construction of the hub profile is beneficial to promote the aerodynamic performance of a transonic fan.

Keywords: aerodynamic design; transonic fan; quasi-3D optimization; flow field diagnosis; secondary flow (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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