An Analysis on the Flow Field Structures and the Aerodynamic Noise of Airfoils with Serrated Trailing Edges Based on Embedded Large Eddy Flow Simulations
作者: Z. G. ZuoQ. HuangS. Liu
刊名: Journal of Applied Fluid Mechanics, 2019, Vol.12 (2), pp.327-339
来源数据库: Directory of Open Access Journals
关键词: Aerodynamic noiseAirfoilSerrated trailing edgeEmbedded Large Eddy Simulation (ELES)Numerical simulation.
原始语种摘要: This paper presents the numerical analysis on the aerodynamic flows and noise of airfoils with serrated trailing edges at . Flow simulations were performed with an embedded large eddy simulation (ELES) method. Two modified airfoils with serrated trailing edges (same widths, different lengths) were studied and compared with the baseline airfoil baseline NACA-0018 airfoil. It is seen that the unsteady lift and drag coefficients of the baseline airfoil A0 have a peak at about 2270Hz, which is close to the tonal noise frequency experimentally observed. Under the flow conditions studied in this research, the longer saw tooth serrations changed the flow fields near the trailing edge, which provides the potential of suppressing the tonal noise. Predictions based on acoustic analogy indicate that...
全文获取路径: DOAJ  (合作)
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关键词翻译
关键词翻译
  • serrated 细齿的
  • noise 噪声
  • trailing 拖尾
  • simulation 模拟
  • tonal 音调的
  • airfoil 机翼
  • understanding 理解
  • paper 
  • studied 学习
  • aerodynamic 气体动力的