INVESTIGATION OF OFF-DESIGN PERFORMANCE OF VANED DIFFUSERS IN CENTRIFUGAL COMPRESSORS PART Ⅱ : A LOW-SOLIDITY CASCADE DIFFUSER

摘要

As the second part of the author's study, off-design behavior of the design and performance parameters in the low-solidity cascade diffuser in a centrifugal compressor is investigated. The experimental flange-to-flange compressor map serves the validity of application of the present CFD work to the detailed investigation of the low-solidity cascade diffuser. Some meanline design and performance parameters as well as three-dimensional internal secondary flow fields are studied when the flow rate is changed from deep choke to stall.