Research on Aerodynamic Performance of Bionic Fan Blades with Microstructured Surface

作者：Meihong Gao, X. T. Liu, Meihui Zhu, Chun Shen, Zhenjiang Wei, Zhengyang Wu, Chengchun Zhang · 发表于：Biomimetics · 年份：2025 · DOI：10.3390/biomimetics11010019 · 被引用次数：3 · 研究领域：Turbomachinery Performance and Optimization、Plasma and Flow Control in Aerodynamics、Heat Transfer Mechanisms

The frictional resistance of impeller machinery blades such as aircraft engines, gas turbines, and wind turbines has a decisive impact on their efficiency and energy consumption. Inspired by the micro-tooth structure on the surface of shark skin, microstructural drag reduction technology has become a cutting-edge research direction for improving aerodynamic performance and a continuous focus of researchers over the past 20 years. However, the significant difficulty in fabricating microstructures on three-dimensional curved surfaces has led to the limited widespread application of this technology in engineering. Addressing the issue of drag reduction and efficiency improvement for small axial flow fans (local Reynolds number range: (36,327–40,330), this paper employs Design of Experiments (DOE) combined with high-precision numerical simulation to clarify the drag reduction law of bionic microgroove surfaces and determine the dimensions of bionic microstructures on fan blade surfaces. The steady-state calculation uses the standard k-ω model and simpleFoam solver, while the unsteady Large Eddy Simulation (LES) employs the pimpleFoam solver and WALE subgrid-scale model. The dimensionless height (h+) and width (s+) of microgrooves are in the range of 8.50–29.75, and the micro-grooved structure achieves effective drag reduction. The microstructured surface is fabricated on the suction surface of the blade via a spray coating process, and the dimensions of the microstructures are de...