| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Outline of Final Research Achievements |
The bending stiffness of an elastic airfoil with a non-uniform cross-section is uniquely determined by the thickness at the position of the center of gravity and the span length, independent of the shape or thickness of the airfoil. It is an important parameter that determines the bending characteristics and the moving boundary conditions at the wall surfaces in the fluid. The characteristic of dynamic forces acting on a heaving elastic airfoil depends on the ratio St2/K. In the regime below the critical Reynolds number, the impact of this parameter is extremely small. For a thin film, the LEVs produced from the leading edge and the TVs produced by the trailing edge interfere strongly and form a vortex ring. An accelerating flow arises even far into the wake of the thin film, because the vortex rings evolve towards the wake at an incline with respect to the main flow, and a substantial propulsive force is induced over almost the entire pitching cycle for an elastic thin film.
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