A horizontal-axis
willow-leaf-shaped
wind power generation device is characterized in that the cross section structure of a blade tip section of a
willow-leaf-shaped counter-power blade is of a
willow-leaf shape, namely, the left arc face and the right arc face are completely symmetrical, and an efficient working method of the blade comprises the steps that working state parameters of a
pitch angle, a zero lift angle and a relative
attack angle are kept to be equal to 0 degree, and a natural
attack angle is equal to 90 degrees. As a result, the direction of rotating resistance is consistent with the chord length direction, so that the rotating resistance is extremely small, a laminar flow boundary layer is relatively stable, and the efficiency of reaction power is relatively high; the cross section structure of the blade root section of the salix
leaf type reverse power blade is asymmetric, the
front edge width is equal and is always larger than the blade
tail deviation degree b, the natural
attack angle is smaller than 90 degrees, and the blade
tail deflection angle is smaller than 30 degrees, so that the natural wind energy
utilization rate can be increased, and rotation resistance is not increased. The
tail fin is additionally arranged at the blade tail of the salix
leaf type reverse power blade, and the tail fin is mainly used for separating wake flow, avoiding turbulent flow loss and reducing
noise.