The lay outs in this thesis is based on basic theories and the test the performance of the product by wind tunnel test and vehicle test. Furthermore, in order to find out the effect of structure change on hub which is one of the components of wind turbine, I compared the actual performance between the existing model and the modified model thoroughly. To improve the performance of wind turbine, I modify the structure of the hub and analysing base model and modify model by using Star-CCM+. As a result, I found out the wing-shaped hub used model stablizes the spin in shorter time than existing model. Therefore, with the optimal blade selection, the structure modification on hub is a considerable variable on wind turbine design which is aiming better performance.

Abstract
 1. 서론
 2. 해석모델 및 풍동 실험
  2.1 해석모델
  2.2 풍동실험
 3. 해석결과
  3.1 내부 구조물이 없는 풍력발전기
  3.2 내부 구조물이 있는 풍력발전기
  3.3 허브 구조를 변경한 풍력발전기
 4. 결론
 후기
 References

• 김진택(전북대학교 기계시스템공학부) | Jin-Taek Kim
• 지창헌(원광대학교 기계자동차공학부) | Chang-Heon Chi