| 摘要 |
The device has a compressor e.g. centrifugal compressor, and an annular passage (12) for supplying air to the compressor. A radial air inlet (34) including lips (30, 32) is connected to the passage in which the lips are partially formed by acoustic attenuators (40, 42) e.g. Helmholtz attenuators. The attenuators attenuate sound frequencies produced by rotation of the compressor, where the lips are made of fibrous reinforcement composite material densified by resin. Another set of acoustic attenuators is integrated to a metallic case (14) defining the passage of the compressor. |
