Abstract
In this article, design optimization was carried out to improve the suction performance and efficiency of a mixed-flow pump impeller. Commercial computational fluid dynamics code and a response surface method were used in the optimization to design a mixed-flow pump impeller. When it comes to a mixed-flow pump, the two main research objectives namely efficiency and suction performance tend to contradict. It is very important that the design technology improves the suction performance while maintaining high efficiency. Meridional plane and vane plane development variables were defined in the design of the impeller. The meridional plane expresses the shapes and sizes of the blades, while the vane plane development describes the impeller inlet and outlet angles as well as the blade angle distribution. The blade angle distribution of the impeller was designed using the traditional method by which inlet and outlet angles are connected smoothly. The surface response method was applied to the design variables of the impeller inlet part in this design optimization because they influence the performance of the mixed-flow pump. Objective functions were set to satisfy the total head at the design flow rate as well as to improve efficiency and suction performance. Design variables of the impeller inlet part of the mixed-flow pump and the changes in performance were analyzed in order to produce the optimal shape. The performance of the optimally designed shape was verified by numerical analysis, and the reliability of the test result was checked by comparative analysis against the reference model.
Highlights
A pump is a mechanical device that transfers fluid by transforming kinetic energy, created by the rotation of an impeller, to pressure energy
Huh et al carried out design optimization of the impeller and diffuser of a mixedflow pump using optimization techniques and computational fluid dynamics (CFD)
SdM in the figure means the length of the curve on the meridional plane. %b1 and %b2 show identical sections of the blade angle at the inlet part and outlet part and are expressed as percentage against the y-axis of the vane plane development. b1 describes the inlet angles of the impeller and blade while b2 shows the outlet angle of the impeller blade. du shows the difference in sweep angles
Summary
A pump is a mechanical device that transfers fluid by transforming kinetic energy, created by the rotation of an impeller, to pressure energy. Blade angles and the meridional plane were designed for the impeller and cross-section distribution was designed for the volute.[5] Huh et al carried out design optimization of the impeller and diffuser of a mixedflow pump using optimization techniques and CFD. A mixed-pump impeller that satisfies the total head at the design flow rate and enhances efficiency and suction performance was optimally designed. In order to design a mixed-flow impeller with enhanced efficiency and suction performance that simultaneously satisfies the pump design specifications, various design techniques are required, from the basic design stage all the way through to the detailed design stage. Design variables of the meridional plane and vane plane development were defined to optimally design a mixed-flow pump with enhanced efficiency and suction performance. Specific speed (r/min, m3/min, m) of impeller from mixed-flow pump is 250
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
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 call
