수력환경에서 테슬라 터빈의 3차원 디스크 구멍 형상에 따른 성능 및 유동 특성 연구

초록

Previous Tesla turbine studies, limited to 2D analyses, have overlooked 3D flow effects, particularly how disc thickness can cause flow separation and reduce efficiency. This study investigates how 3D disc hole geometries influence turbine performance. Four disc prototypes were fabricated and tested under controlled hydraulic conditions. Performance was evaluated via efficiency measurements, and Particle Image Velocimetry (PIV) was used to analyze flow characteristics. The optimized D30 geometry achieved the highest efficiency Best Efficiency Point (BEP) of 19.68%, a significant improvement over the standard disc (15.19%). The D20+d model also showed high efficiency at 18.52%. PIV analysis confirmed that these 3D geometries enhanced fluid-disc energy transfer, indicated by a greater rotational speed difference between the inlet and outlet. These results demonstrate that 3D hole geometry is a critical factor for enhancing bladeless turbine performance.

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