An Aerodynamic Noise Reduction Design at Inter-coach Space of High Speed Trains Based on Biomimetic Analogy

  • Han, Jae-Hyun (Department of Mechanical Engineering, Hongik University) ;
  • Kim, Jung-Soo (Department of Mechanical and System Design Engineering, Hongik University)
  • Received : 2011.09.24
  • Accepted : 2011.09.26
  • Published : 2011.09.30


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 increased 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 are 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 vortex distributions which are expected to lead to varying aerodynamic noise levels.


Grant : Development of Biomimetic Design Methodology

Supported by : National Research Foundation of Korea

Cited by

  1. Analysis of Aerodynamic Noise at Inter-coach Space of High Speed Trains vol.7, pp.4, 2014,
  2. Aerodynamic noise radiating from the inter-coach windshield region of a high-speed train vol.37, pp.3, 2018,