The aero-acoustic noise reduction based on biomimetics : A case study

생체모방공학을 이용한 공력 소음 저감 기초 연구

  • 한재현 (홍익대학교 음향.진동 실험실) ;
  • 김태민 (홍익대학교 기계공학과) ;
  • 김정수 (홍익대학교 기계.시스템 디자인 공학과)
  • Published : 2011.04.27

Abstract

Recent years have witnessed speed up of moving vehicles such as high-speed of trains. Increase in speed entails concomitant increase in turbulent air flow which contributes toward aerodynamic noise. The proposed method for aerodynamic noise reduction is based on a biomimetic design of owl feather. The five morphological parameters of the owl feather is extracted from close observation, and simulation cases are constructed by applying design of experiments methodology. Swirling strength for each case is obtained through steady-state CFD analysis, and key morphological parameters that affect the turbulence are identified. Large eddy simulations (LES) are then performed on selected cases to predict the air turbulence. Different cases show varying vorticity distribution levels which is expected to lead to varying aerodynamic noise levels.

Acknowledgement

Grant : 생체모방공학을 활용한 공학디자인 방법론 개발

Supported by : 한국연구재단