| 摘要 |
<p>A blower, comprising an impeller having a plurality of blades (3) installed on the outer periphery of a hub (2), wherein the specific areas (Q) of the blades (3) extending, in a specified width, in a vane span direction along the trailing edges (3b) of the blades (3) are bent to a negative pressure surface (3f) side, whereby the separation of air flow becomes hard to occur on the negative pressure surface (3f) of the blades (3) to suppress the disturbance of a wake (A0), the stream of the air flow discharged rearward from the trailing edges (3b) becomes smooth on the pressure surface (3e) side to reduce the disturbance, and thus the width of the wake (A0) is reduced to improve the aerodynamic characteristics of the blades.</p> |
