Investigation of Aerodynamic and Aeroacoustic Behavior of Bio-Inspired Airfoils

A special issue of Biomimetics (ISSN 2313-7673).

Deadline for manuscript submissions: 20 June 2025 | Viewed by 461

Special Issue Editors


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Guest Editor
Department of Fluid Machinery and Engineering (Machine Pump Research Center), School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710048, China
Interests: optimization and bionic design of fluid-Machinery; bionic flow and noise control; computaional fluid dynamics; fluid topology optimization

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Guest Editor
School of Power and Energy, Northwestern Polytechnical University, Xi'an 710072, China
Interests: numerical simulation of complex flow fields of axial and centrifugal impellers; aerodynamic design of high-efficiency and energy-saving impeller machinery; computational fluid dynamics theory and engineering application; advanced flow display and measurement technology; simulation and analysis of aerodynamic and thermal processes of propulsion systems

Special Issue Information

Dear Colleagues,

As the basic component unit of impeller blades in fluid machinery such as pumps and fans, airfoils play a crucial role in improving the performance of fluid machinery. Although researchers have carried out a series of airfoil development and optimization design, in some special application scenarios, existing serialized airfoils still cannot meet the design requirements of high-performance fluid machinery. Innovative airfoils still need to be developed to meet the flow control requirements inside the impeller, effectively improve the aerodynamic performance, and reduce the noise of fluid machinery. Inspired by the functional structures of organisms in nature, such as the silent flying long eared owl, the agile hovering emerald bird, the efficiently propelled tuna, and beetles with both bright and dark wings, this brings inspiration to the airfoils design. This Special Issue aims to collect bionic design of airfoils, optimization methods of airfoils, flow control mechanisms of bionic airfoils, the numerical modeling and aerodynamic performance analysis of bionic airfoils, the aerodynamic noise characteristics and prediction of bionic airfoils, bionic airfoils applications in different types of fluid machinery, etc. This Special Issue includes but is not limited to the above scope.

Prof. Dr. Xiaomin Liu
Prof. Dr. Limin Gao
Guest Editors

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Keywords

  • bio-inspired airfoil
  • fluid machinery
  • flow control
  • bionic design
  • aerodynamic performance
  • noise reduction
  • numeircal simulation
  • experimental study

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Published Papers (1 paper)

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Research

28 pages, 22273 KiB  
Article
Analytical Solution and Analysis of Aerodynamic Noise Induced by the Turbulent Flow Interaction of a Plate with Double-Wavelength Bionic Serration Leading Edges
by Chenye Tian, Xiaomin Liu, Lei Wang, Yuefei Li and Yandong Wu
Biomimetics 2025, 10(4), 193; https://doi.org/10.3390/biomimetics10040193 - 21 Mar 2025
Viewed by 232
Abstract
As a bionic flow control structure, leading-edge serrations have been proven to effectively suppress the aerodynamic noise of airfoils. Compared with single-wavelength serrations, a greater noise reduction potential can be obtained for airfoils with the double-wavelength serrations because of the phase interference at [...] Read more.
As a bionic flow control structure, leading-edge serrations have been proven to effectively suppress the aerodynamic noise of airfoils. Compared with single-wavelength serrations, a greater noise reduction potential can be obtained for airfoils with the double-wavelength serrations because of the phase interference at different tip-to-root ratios. In this study, in order to reduce the aerodynamic noise of a flat plate operating in a steady uniform flow, double-wavelength leading-edge serrations based on Ayton’s analytical model are optimized by the meta-heuristic optimization algorithm. The effects of different double-wavelength serrations on the noise characteristics of the flat plate are investigated. By comparing and analyzing the radiation integral function and quantifying the sound pressure along the leading edge of the flat plate, the local source cut-off effect resulting from the large transition curvature of the root and phase difference superposition is analyzed in detail. The results show that, before the first inflection point, the convex sinusoidal and iron-shaped serrations can significantly reduce the aerodynamic noise of the flat plate. When the concave ogee-shaped serrations are adopted, the reduction of the high-frequency noise is more obviously. Especially when the slits are embedded at the roots of the optimized leading-edge serrated structures, the improved design further promotes an additional noise reduction level of 0.7 dB for the flat plate. Through numerical studies, the coupled noise reduction mechanism of the serration roots and the slits is also revealed. Full article
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