Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Fabrication of a Micro-Riblet Film Using MEMS Technology and Its Application to Drag Reduction

MEMS 기술을 이용한 미소 리블렛 필름 제작 및 항력 감소에의 응용

  • 한만희 (포항공과대학교 학부 기계공학과) ;
  • 허정기 (포항공과대학교 대학원 기계산업공학부) ;
  • 이상준 (포항공과대학교 기계공학과) ;
  • 이승섭 (포항공과대학교 기계공학과)
  • Published : 2002.07.01
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Abstract

This paper presents the fabrication method of a micro-riblet film (MRF) using MEMS technology and the experimental results of the drag reduction of an airfoil with MRFs. Riblets having grooved surface in the streamwise direction has been proven as an effective passive control technique of the drag reduction. A V-grooved pattern on (100) silicon wafer is etched with anisotropic bulk micromachining. The MRF is completed by replicating the V-grooved pattern with polydimethylsiloxane (PDMS). Experiments were performed by measuring a velocity field behind the trailing edge of a NACA 0012 airfoil with and without MRFs in a closed-type subsonic wind tunnel using particle image velocimetry (PlV) technique. The MRF provides about 3.8 % drag reduction compared to the drag on a smooth airfoil when the freestream velocity of wind tunnel is 3.3 m/s.

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References

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