다구찌 기법을 활용한 블레이드리스 풍력발전기의 오리가미 기반 외피 구조 설계 최적화

초록

This study presents a Taguchi method-based design optimization of an origami-inspired outer shell for bladeless wind turbines to address insufficient excitation at low wind speeds and structural instability at high wind speeds. An arc Miura-ori structure is applied to the upper shell to enhance vortex formation and alternating lift, whereas an Antichiral Kresling structure is applied to the lower shell to control torsional deformation and improve stability. A Taguchi method is established based on selected variable combinations, and unsteady flow analyses evaluate vortex-induced vibrations using the fluctuating lift coefficient (CL_RMS). Structural stability is further assessed through fluid–structure interaction (FSI) and modal analyses. The optimized design achieves a 46.4% increase in CL_RMS compared to a conventional cylindrical shell. Wind tunnel experiments demonstrate early flow separation and a more regular vortex wake, confirming favorable conditions for alternating lift generation.

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