| 摘要 |
PROBLEM TO BE SOLVED: To provide an airfoil section of a propeller for a propulsion device.SOLUTION: An airfoil section of a propeller for a propulsion device includes a pressure surface 134 and a suction surface 132, the pressure surface and suction surface intersecting at a leading edge 131 and a trailing edge 133. The airfoil section has a meanline 130 defined midway between the pressure surface and the suction surface and a meanline angle 139 is defined as an angle between a tangent to the meanline and a centerline 112 of the propeller. The blade has a meanline curvature defined as the slope of a meanline angle with respect to chord fraction along the meanline, and at least a portion of the meanline has a meanline curvature that increases from between approximately 0.1 chord fraction progressing toward the leading edge and at least a portion of the meanline has a meanline curvature that decreases from between approximately 0.1 chord fraction progressing toward the leading edge. |
