Abstract
Under-water glider is the glider to use for environmental researches in lake and sea. The Reynolds number of flow around under-water glider is between 1 X 104 and 1 X 105. In this study, aerodynamic characteristics of under-water glider at low Reynols number were investigated by the towing water tank experiment and numerical analysis of two-dimensional wings. The experimental data were obtained by the measurements of the lift and drag force acting on the under-water glider model. Planforms of wing of model are rectangle, taper, and sweptback wings, and aerofoils of wing are flat plate, NACA0012, NACA0008, NACA6406, NACA3310, SE4410 which is the cross section shape of flamingo's wing, and Remodeled SE4410 which remodels lower surface of SE4410. As results of experiment, the difference of planform of wings has few effects on aerodynamic characteristics and the lift-drag ratio of NACA6406 is the largest of aerofoils. As results of numerical analysis, pressure coefficient of lower surface of SE4410 is larger in front and rear range and smaller in central range than NACA3310, and Remodeled SE4410 can improve small pressure region of SE4410.
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