| 摘要 |
<p>A centrifugal compressor having a casing (3) that houses an impeller (2) allowing rotation about a rotational axis C, a gas channel (4), a treatment hollow part (18) provided inside the casing, a first channel (21) open to the gas channel on the downstream side of the blade leading edge (17) of the impeller, a second channel (22) open to the gas channel at the upstream side of the blade leading edge (17), a guide vane (23) that imparts a swirl component in an opposite rotational direction of the impeller to gas discharged from the second channel, a constricting part (24) that constricts the gas channel, and a rectifying part (25) that rectifies gas in a direction that minimizes the swirl component about the rotational axis C and also increases the component in the direction of the rotational axis C.</p> |
