| 摘要 |
<p>A turbofan (14,70) includes a row of fan blades (32) extending from a supporting disk (34) inside an annular casing (16). Each blade (32) includes an airfoil (36) having opposite pressure and suction sides (42,44) extending radially in span between a root and tip (46) and axially in chord between leading and trailing edges (48,50). Adjacent airfoils (36) define corresponding flow passages (52) therebetween for pressurizing air. Each airfoil (36) includes stagger increasing between the root and tip (46), and the flow passage (52) has a mouth (54) between the airfoil leading edge (48) and the suction side (44) of an adjacent airfoil and converges to a throat (56) aft from the mouth (54). The row includes no more than twenty fan blades (32) having low tip solidity for increasing the width of the passage throat (56).</p> |
