Abstract
Low-solidity circular cascades have been applied successfully as a part of the diffuser system of a transonic centrifugal compressor. Three types of diffusers with and without an inlet passage width contraction or a pinch upstream of a cascade were tested. An appropriately contracted diffuser realized high compressor efficiency at high rotor speed due to the decrement in input power. Effects of a pinch on surge and choke were also discussed. Choke occurred at the throat of cascades of a pinched-type diffuser at lower flow rate than the inducer choke flow in spite of a low-solidity cascade. A pinched diffuser had a stabilizing effect on the diffuser characteristics but only a small amount of gain in the surge margin was obtained owing to the change in impeller characteristics.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
