부산대학교 도서관

This work presents progress on a detailed aerodynamic evaluation of miniature trailing-edge effectors for active rotor control. We begin with a two-dimensional computational fluid dynamics study focused on establishing the dependency of miniature trailing-edge effector effectiveness and performance upon basic geometric parameters of a VR-12 airfoil. The computational fluid dynamics study demonstrated that a miniature trailing-edge effector placed at 10% chord upstream of the trailing-edge and sized at approximately 1% chord is capable of delivering moment coefficient increments of approximately ±0.03, or the same moment authority as a 20% chord conventional flap moving ±2.3°. Wind-tunnel experiments were performed on a model blade section equipped with an operational miniature trailing-edge effector in order to validate the steady computational fluid dynamics results, and reasonable agreement was shown. Finally, a small set of three-dimensional unsteady computational fluid dynamics simulations with the prescribed blade motion of a rotor equipped with miniature trailing-edge effectors were performed. Under high-thrust moderate speed conditions, miniature trailing-edge effectors deployed sinusoidally at 4/rev frequency were capable of reducing 4/rev integrated aerodynamic loads in the vertical direction by approximately 80%. [ABSTRACT FROM AUTHOR]