| 摘要 |
PROBLEM TO BE SOLVED: To provide a high-performance high-pressure centrifugal compressor which can prevent the occurrence of rotating stall noticeable in a comparatively-low specific speed impeller stage and is highly reliable. SOLUTION: The centrifugal compressor has a first vaneless diffuser with a constant flow channel height at the downstream side of an impeller, and a second vaneless diffuser wherein the flow channel height is decreased in a flow direction from an inlet to an outlet at the downstream side of the first vaneless diffuser. These diffusers are combined with an impeller using thick blades, and thereby the occurrence of rotating stall can be prevented, and high efficiency can be attained. COPYRIGHT: (C)2010,JPO&INPIT
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