화물차 주위 유동의 성긴 격자 큰에디모사

DOI QR코드

DOI QR Code

이상승;김명균;유동현;김정재;이상준
Lee, S.;Kim, M.;You, D.;Kim, J.J.;Lee, S.J.

  • 투고 : 2016.02.11
  • 심사 : 2016.03.18
  • 발행 : 2016.03.31

초록

In order to investigate effects of grid resolution on large-eddy simulation of flow over a heavy vehicle, large-eddy simulations over the vehicle with coarse grid and fine grid are conducted. In addition, comparison of drag coefficients with the experimental data obtained by a wind tunnel experiment is conducted. Both of the drag coefficients of coarse grid and fine grid large-eddy simulation show good agreement with the experimental data. Flow fields obtained by the coarse and the fine grid large-eddy simulation are compared in the vehicle frontal-face region, the vehicle rear wheel region, and the vehicle base region. Coarse grid large-eddy simulation shows good agreement with the fine grid large-eddy simulation in the vehicle front face region and the vehicle rear wheel region, since the flow over the present vehicle is dominated by flow separation which is geometrically pre-determined, not by the skin friction which is known to be sensitive to grid resolution.

키워드

큰에디모사;박리유동;격자 해상도

참고문헌

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과제정보

연구 과제 주관 기관 : 국토교통과학기술진흥원