TITLE:
Numerical Investigation of Aerodynamic Characteristics by a Rotating Thin Plate
AUTHORS:
Yoshihiro Kubota, Osamu Mochizuki
KEYWORDS:
Autorotation, Thinplate, Vortex, Vortexmethod, Speed of Rotation, Spin Parameter
JOURNAL NAME:
World Journal of Mechanics,
Vol.5 No.3,
March
23,
2015
ABSTRACT: In this
study, we use a thin rotating plate to generate propulsion and lift for a paper
plate. And the thin plate rotates along the spanwise axis. We numerically
determine the influence on aerodynamic characteristics with a rotational
velocity of the thin plate. The rotational velocity is obtained with spin
parameter which is the ratio of the peripheral speed of the plate to the main
flow velocity. And the numerical simulations based on the discrete vortex
method show that the autorotation mode of the plate in a uniform flow appears
naturally when the spin parameter is unity. Vortex formed from the
backward-rotating edge is weaker than those generated from the forward-rotating
edge of thin plate. The maximum lift generated at S = 0.75 if S S ≤ 1.75. The most negative moment
appears when S = 1; at that time,
autorotation occurs naturally.