| 摘要 |
<p>A centrifugal compressor (10) for compressing a fluid comprises a compressor wheel (12) having a plurality of circumferentially spaced blades (16), and a compressor housing (22) in which the compressor wheel is mounted. The compressor housing includes an inlet duct (24) through which the fluid enters in an axial direction and is led by the inlet duct into the compressor wheel, and an inner surface (28) located radially adjacent the tips of the blades. A bleed port (42) is defined in the inner surface of the compressor housing at a location intermediate the leading (30) and trailing (32) edges of the blades, for bleeding off a bleed portion of the fluid, the bleed port leading to a recirculation flow channel (44) that feeds the bleed portion back into the inlet duct. Highly cambered vanes (70) are disposed in the recirculation flow channel for turning the bleed portion to take out and in some cases reverse the swirl in the bleed portion.</p> |
