Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
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Numerical Analysis on Performance Improvement for Wind Blade by the Groove

Groove를 활용한 풍력블레이드 성능향상을 위한 수치적 연구

  • 홍철현 (부산대학교 기계설계인력양성센터) ;
  • 서성호 (한국과학기술정보연구원)
  • Received : 2011.04.26
  • Accepted : 2011.05.24
  • Published : 2011.05.31
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Abstract

This study, a basic study to improve aerodynamic characteristic of a wind blade, explored through CFD how much the lift to drag ratio improves according to the shape of groove formed on the surface of airfoil NACA0015. This study found out that the ratio improves by 8.7% when the ratio between boundary layer(${\delta}$) and the depth of groove(h), the ratio between the depth of groove(h) and the width of groove(d) and the ratio between the length(p) from one groove to the other and the width of groove are 1.1, 0.1 and 1.2 respectively. The number of grooves is two. It was also confirmed that the improvement of the lift to drag ratio is maintained after certain angle of attack.

본 연구는 풍력블레이드의 공력특성 향상을 위한 기초연구로서, 익형의 표면에 형성된 groove의 형상에 따른 양항비의 개선정도를 전산해석을 통해 분석하였다. 본 연구의 계산 범위에서 경계층(${\delta}$)과 groove 깊이(h)의 비는 1.1, groove 깊이(h)와 폭(d)의 비는 0.1, groove 사이의 거리(p)와 폭(d)의 비는 1.2, groove 수는 2개의 경우에서 양항비가 8.7% 향상된 결과를 보였다. Groove에 의한 양항비의 개선정도가 특정 받음각 이후에서도 지속됨을 확인하였다.

Keywords

References

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