STRESS ANALYSIS OF VARIOUS DESIGNS OF CENTRIFUGAL PUMP IMPELLERS USING FINITE ELEMENT METHOD

Keywords

centrifugal pump impeller
optimisation
finite element analysis
stress analysis

Abstract

The impeller blade is among the many critical components in a centrifugal pump that affect the efficiency of the pump, as it is the component through which the fluid passes. Therefore, the impeller requires as many analysis as possible to maximise its efficiency. The main requirement is to ensure that the impeller blade can withstand the level of stress thereby reducing the chance of blade fracture.  In this paper, 4 different designs of a centrifugal pump impeller were analysed and compared using finite element analysis (FEA) under static analysis. The geometry of centrifugal pump impellers was modelled and analysed using Siemens NX™ software. This analysis provided an insight of performance of design where the blade’s angle, width and shrouds are kept constant throughout the process. Calculations were performed to predict the design discharge and understand the impact on the impeller if the blade angle changes. The analysis revealed that the higher the outlet blade angle is to a point in comparison to the blade at inlet, the higher the head and the higher the pressure at the outlet will be. A pressure load of 1.866 MPa was applied evenly to the impellers with a rotation of 1,100 rpm and a torque of 29.187 Nm. Throughout the analysis, closed impeller blades were set to produce the least stress and displacement in comparison to other designs. Therefore, closed impeller was the best design, where the maximum stress was the lowest (86.09MPa) and can be more reliable in real life application.

https://doi.org/10.35934/segi.v7i1.48

References

Babalola, P.O., Omada, J.E., Kilanko, O., Banjo, S., and Ozuor, O. (2019). Performance Evaluation of a Centrifugal Pump with Different Impeller Materials. Journal of Physics: Conference Series. 1378, pp. 022091.

Bachche, P.J., and Tayade, R.M. (2013). Finite element analysis of shaft of centrifugal pump. IOSR Journal of Mechanical and Civil Engineering 7(3), pp. 37-42.

Khaing, H., Lwin, Y. M., and Lwin, Y. (2019). Design and Calculation of Centrifugal Pump (Impeller) For Water Pumping. International Journal of Science, Engineering and Technology Research 8(7), pp. 321-324.

Kim, J.H., Oh, K.T., Pyun, K.B., Kim, C.K., Choi, Y.S., and Yoon, J.Y. (2012). Design optimization of a centrifugal pump impeller and volute using computational fluid dynamics. IOP Conference Series: Earth and Environmental Science. 15, pp. 032025.

Matlakala, M.E., Kallon, D.V.V., Mogapi, K.E., Mabelane, I.M., and Makgopa, D.M. (2019). Influence of Impeller Diameter on the Performance of Centrifugal pumps. IOP Conference Series: Materials Science and Engineering. 655, pp. 012009.

Michael-smith-engineers. (2020). Useful Information On Centrifugal Pumps. [online] Available at: <https://www.michael-smith-engineers.co.uk/resources/useful-info/centrifugal-pumps> [Accessed 26 July 2021].

Prasad, A.S., Rao, B.L., Babji, A., and Babu, D.P.K. (2013). Static and Dynamic Analysis of a centrifugal pump impeller. International Journal of Scientific & Engineering Research 4(10), pp. 966-71.

Selamat, F.E., Wan Izhan, W.H.I., and Baharudin, B.S. (2018). Design and analysis of centrifugal pump impeller for performance enhancement. Journal of Mechanical Engineering 1, pp. 36-53.

Structures.aero. (2019). Static. [online] Available at: https://structures.aero/software/nx-nastran/static/ [Accessed 30 March 2020].

Tairu, O.O., Aiyedun, P.O., and Tairu, O.T. (2014). Relationship between Yield stress and yield Strength on Various Grade of steel Being Hot rolled. IOSR Journal of Mechanical and Civil Engineering 11(1), pp. 40-46.

Traya, S.U., and Rathod, H.J. (2020). Design and Analysis of Centrifugal Pump Impeller for Optimizing Strength & Weight of Impeller. International Journal of Progressive Research in Science and Engineering 1(7), pp. 7-15.

Wingender, J., Neu, T.R, and Flemming, H.C. (1999) Microbial Extracellular Polymeric Substances: Characterization, Structures and Function, Springer-Verlag, Berlin, Heidelberg.

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