摘要
采用仿生前缘结构设计翼型,可有效改善其气动性能和降噪效果。以NACA0012翼型为标准翼型,构建了五种不同振幅与波长组合的波状前缘仿生翼型。运用SST k-ω湍流模型和大涡模拟方法,对翼型气动性能和流场噪声进行模拟分析。结果表明,增大波长在优化气动性能中效果显著,仿生翼型升阻比最多可提高21.8%;提高振幅强化了前缘流场调控作用,使前缘压力分布更为均匀,延缓了流动分离。仿生结构降低了最大升阻比对应攻角,改善了大攻角下翼型气动性能。仿生翼型在中高频段表现出良好降噪效果,在小攻角条件下,减弱了单音噪声和宽频噪声。声压级在所研究攻角内均优于标准翼型,且在攻角3°时降噪效果最佳,降幅达14 dB。
Designing airfoils with biomimetic leading-edge structures of fers an effective approach to concurrently improve aerodynamic and noise reduction performance.Five biomimetic airfoils with wavy leading-edge characterized by different combinations of amplitude and wavelength are designed using the NACA0012 airfoil as a baseline.Numerical simulations employing the SST k-ωand large eddy simulation methods are performed to analyze their aerodynamic performance and flow noise.The results indicate that increasing the wavelength significantly improves aerodynamic performance,with the lift-drag ratio enhanced by up to 21.8%.Increasing the amplitude strengthens flow control at the leading edge,resulting in a more uniform pressure distribution and delayed flow separation.The biomimetic structure reduces the angle of attack corresponding to the maximum lift-drag ratio and improves aerodynamic performance at high angles of attack.The biomimetic airfoils demonstrate notable noise reduction in the mid-to-high frequency range.Under small angles of attack,both tonal and broadband noises are suppressed.A reduction in sound pressure level is observed across all studied angles,peaking at 14 dB at an angle of attack of 3°.
作者
刘荣彬
侯容
蒋首民
董岳
栾亨宣
LIU Rongbin;HOU Rong;JIANG Shoumin;DONG Yue;LUAN Hengxuan(College of Intelligent Equipment,Shandong University of Science and Technology,Taian,Shandong 271019;AECC Shenyang Engine Research Institute,Shenyang,Liaoning 110015;College of Resource Environment and Safety Engineering,Jining University,Jining,Shandong 273155;College of Mechanical and Electronic Engineering,Shandong University of Science and Technology,Qingdao,Shandong 266590)
出处
《液压与气动》
北大核心
2025年第8期56-64,共9页
Chinese Hydraulics & Pneumatics
基金
国家自然科学基金(52204171)
山东省自然科学基金(ZR2021QE085)
山东省高等学校青年创新团队发展计划项目(2022KJ321)。
关键词
仿生前缘
数值模拟
气动性能
优化设计
降噪
biomimetic leading-edge
numerical simulation
aerodynamic performance
optimization design
noise reduction
