Abstract
To determine the influences of the main structural parameters on open-design vortex pump performance, optimize the vortex pump performance, and reduce the running vibration and improve stability, orthogonal testing method was introduced in this paper. The selected main factors included impeller outer diameter (D2), impeller outlet width (b2), outlet setting angle of impeller (β2), and inlet setting angle of impeller (β1), and the nine types of impellers were coded according to orthogonal table. After obtaining the preliminarily optimum value range for each factor through range analysis, comprehensive analysis was employed based on the orthogonal test to investigate the main factors and identify the primary and secondary influencing factors affecting the performance of the vortex pump. An optimization scheme was obtained for further design. The results show that the numerical calculation results of the optimization scheme pump are in good agreement with the test results, and it shows the feasibility of the numerical calculation method. The testing results showed that efficiency and head of the optimal model were 4.2% and 9 m higher than those of the prototype model, respectively. Improved efficiency and head met the design requirements. The orthogonal testing method proved the feasibility of performance optimization of the vortex pump. The backflow occurs at the pump entrance and rotates in the same direction with impeller. It moves along the pipe wall from the lateral cavity to the inlet and encourters with the approaching flow.
Highlights
To determine the influences of the main structural parameters on open-design vortex pump performance, optimize the vortex pump performance, and reduce the running vibration and improve stability, orthogonal testing method was introduced in this paper. e selected main factors included impeller outer diameter (D2), impeller outlet width (b2), outlet setting angle of impeller (β2), and inlet setting angle of impeller (β1), and the nine types of impellers were coded according to orthogonal table
An optimization scheme was obtained for further design. e results show that the numerical calculation results of the optimization scheme pump are in good agreement with the test results, and it shows the feasibility of the numerical calculation method. e testing results showed that efficiency and head of the optimal model were 4.2% and 9 m higher than those of the prototype model, respectively
A type of open-design vortex pump has been optimally designed and experimentally verified, and the optimized model pump has been numerically simulated under different flow conditions. rough numerical simulation and experiments, performance curves and internal flow field results have been obtained. e conclusions include the following aspects
Summary
An open design vortex pump with a specific speed of 166 was selected as the research object. E design flow rate was Qdes 500 m3/h; rated speed n 1485 r/. Experimental efficiency is 42.36%, and the experimental head measures 20.24 m; these values do not satisfy the specified efficiency and head values.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have