TY - GEN
T1 - Measurement of unsteady aerodynamic force of 3d flapping wing in hovering to forward flight
AU - Nagai, Hiroto
AU - Isogai, Koji
AU - Hayase, Toshiyuki
PY - 2008
Y1 - 2008
N2 - We measured unsteady aerodynamic forces of a 3D flapping wing in hovering and forward flight using a dynamically scaled mechanical model in a water tunnel, and investigated effects of motion kinematics of a flapping wing on the aerodynamic characteristics. Two simple motion types were used for comparison; trapezoidal and sinusoidal types, whose time histories of angular velocities are represented as trapezoidal and sinusoidal functions, respectively. The results show that the trapezoidal type of flapping motion and the trapezoidal type of feathering motion with the shorter rotational time should be selected in order to obtain higher efficiency in both hovering and forward flight. In order to obtain larger lift, the sinusoidal type of flapping motion and the trapezoidal type of feathering motion should be selected in hovering and slower forward flight; and the sinusoidal type of flapping motion and the sinusoidal type of feathering motion should be selected in faster forward flight.
AB - We measured unsteady aerodynamic forces of a 3D flapping wing in hovering and forward flight using a dynamically scaled mechanical model in a water tunnel, and investigated effects of motion kinematics of a flapping wing on the aerodynamic characteristics. Two simple motion types were used for comparison; trapezoidal and sinusoidal types, whose time histories of angular velocities are represented as trapezoidal and sinusoidal functions, respectively. The results show that the trapezoidal type of flapping motion and the trapezoidal type of feathering motion with the shorter rotational time should be selected in order to obtain higher efficiency in both hovering and forward flight. In order to obtain larger lift, the sinusoidal type of flapping motion and the trapezoidal type of feathering motion should be selected in hovering and slower forward flight; and the sinusoidal type of flapping motion and the sinusoidal type of feathering motion should be selected in faster forward flight.
KW - Flapping wing
KW - Forward flight
KW - Hovering
KW - Insect
KW - Unsteady aerodynamic forces
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M3 - Conference contribution
AN - SCOPUS:84879528640
SN - 9781605607153
T3 - ICAS Secretariat - 26th Congress of International Council of the Aeronautical Sciences 2008, ICAS 2008
SP - 800
EP - 810
BT - ICAS Secretariat - 26th Congress of International Council of the Aeronautical Sciences 2008, ICAS 2008
T2 - 26th Congress of International Council of the Aeronautical Sciences 2008, ICAS 2008
Y2 - 14 September 2008 through 19 September 2008
ER -