Computational Aeroacoustic Analysis around an Airfoil Using Linearized Euler Equations

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  • Ｌｉｎｅａｒｉｚｅｄ　Ｅｕｌｅｒ　Ｅｑｕａｔｉｏｎによる翼型まわりの流れと音の連成解析
  • Linearized Euler Equation ニ ヨル ヨクガタマワリ ノ ナガレ ト オト ノ レンセイカイセキ

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In this paper, a computational method is discussed to predict aerodynamic sound fields. The sound radiation is analyzed using LEE (Linearized Euler Equations) with source terms of sound generation. The sound generation is computed with the SNGR (Stochastic Noise Generation and Radiation) model for local turbulence scales obtained from RANS (Reynolds Averaged Navier-Stokes) flow simulation. In the analyses, an unstructured grid method is employed for effective handling of complex geometric models. This method is applied to aeroacoutic simulation around an airfoil. The results show that sounds are generated by turbulent boundary layers interacting with the trailing edge.

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