Abstract
Theperformanceand owstructure in anunshrouded impeller of approximately4:1 pressure ratio is synthesized froma detailed analysisof three-dimensionalviscous computational uid dynamics(CFD)results and aerodynamic measurements. A good data match was obtained between CFD and measurements using laser anemometry and pneumatic probes. This solidi ed the role of the CFD model as a reliable representation of the impeller internal ow structure and integrated performance. Results are presented showing the loss production and secondary ow structure in the impeller. The results indicate that, while the overall impeller ef ciency is high, the impeller shroud static-pressure recovery potential is underdeveloped, leading to a performance degradation in the downstream diffusing element. Thus, a case is made for a follow-on impeller parametric design study to improve the ow quality. A strategy for aerodynamic performance enhancement is outlined, and an estimate of the gain in overall impeller ef ciency that might be realized through improvements to the relative diffusion process is provided.
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 callDisclaimer: 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.
