Abstract
The backflow vortexes at the suction connection in high-speed centrifugal pumps have negative effect on the flow field. Setting an orifice plate in front of the inducer is able to decrease the negative effect caused by backflow vortexes. The traditional plate is able to partially control the backflow vortexes, but a small part of the vortex is still in the inlet and the inducer. Four new types of orifice plates were created, and the control effects on backflow vortexes were analyzed. The ANSYS-CFX software was used to numerically simulate a high-speed centrifugal pump. The variations of streamline and velocity vectors at the suction connection were analyzed. Meanwhile, the effects of these plates on the impeller pressure and the internal flow field of the inducer were analyzed. Numerically, simulation and experimental data analysis methods were used to compare the head and efficiency of the high-speed pumps. The results show that the C-type orifice plate can improve the backflow vortex, reduce the low-pressure area, and improve the hydraulic performance of the high-speed pump.
Highlights
High-speed centrifugal pumps have the characteristics of high speed, high head, and small flow rate
The results indicated that backflow vortex was caused by inducer, and there was interaction between backflow and secondary flow
The control effect of backflow vortexes at the inlet by the type A orifice plate was obvious, but there were some vortexes in the flow field and at the outlet of the inducer
Summary
High-speed centrifugal pumps have the characteristics of high speed, high head, and small flow rate. Keywords High-speed centrifugal pump, backflow vortex, orifice plate, numerical simulation, pressure distribution The effects of different plate dimensions to the strength of backflow vortex at the suction connection and the variation of pressure on the inducer were analyzed.
Sign-in/Register to view highlights & summary 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.
