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학술대회자료
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한국항공우주학회 한국항공우주학회 학술발표회 초록집 Proceedings of KSAS-JSASS Joint International Symposium on Aerospace Engineering
발행연도
2008.11
수록면
175 - 180 (6page)

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The purpose of this work is to develop the winglets optimization process with trading between aerodynamic benefits and structural penalties. The evaluation model of winglets has been developed using CFD (Computational Fluid Dynamics) coupled with wing structure models. A wing aero-elastic deformation at the flight condition is estimated using a beam model and air-load obtained from CFD (Euler code). Consequently, the aerodynamic performance of a wing equipped with winglets is evaluated at the 1-G night shape including wing aero-elastic penalties. The weight impacts are evaluated by resizing wing structure models to resist critical loads with the winglets. The evaluation model has been extended to optimization process using response surface method (RSM). The optimization process has been applied to design of winglets for a small civil airplane (The MTOW is 55ton). In present work. the winglet design variables consist of a span, a cant angle and an incidence. Wing twist distribution is also considered as a design variable to optimize the load distribution of wing-winglet configuration and correct wing shape at 1-G cruise condition. As a result, optimized wing with winglets provides significant cruise drag reduction with less weight impacts.

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Abstract
1. INTRODUCTION
2. OPTIMIZATION PROCESS
3. APPLICATION OF OPTIMIZATION PROCESS
4. OPTIMIZATION RESULTS
5. CONCLUSIONS
ACKNOWLEDGMENTS
REFERENCES

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