To develop a solid hydraulic designing model, a systematic survey of the existing hydraulic designing models and the blading layout techniques for centrifugal pump impellers is performed. Firstly, a hydraulic designing technique based on blade loading model is put forth using the Euler pump and turbine equation and the Bernoulli equation under the rotating reference frame. Secondly, a brief introduction on the conformal mapping method is presented. Thirdly, a blading layout technique is performed by the transformation between polar and rectangular plane coordinates. At last, the hydraulic designing model and the blading layout techniques are integrated into a CAD based designing system. The system is proved ﬂexible and robust during the practical designing process. Keywords Centrifugal pumps Hydraulic designing Rotating reference frame Blade loading model Conformal mapping -1 List of symbols W Relative velocity on the suction side (m s ) b Blade inlet width (mm) b Blade inlet angle () 1 1 b Blade outlet width (mm) b Blade outlet angle () 2 2 -1 D Impeller suction eye diameter (mm) x Angular velocity of impeller (rad s ) -3 D Impeller wheel diameter (mm) q Fluid density (Kg m ) -2 g Gravitational
Iranian Journal of Science and Technology, Transactions of Mechanical Engineering – Springer Journals
Published: May 30, 2018
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