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Flow of a nanofluid in an inter blade canal of a centrifugal pump

Allali A., Belbachir S., Lousdad A., Aminallah M., Dahmani A.

Mechanics and Mechanical Engineering

2017

Vol. 21, nr 2

243--251

The use of centrifugal pumps in the hydraulic transport of nano-fluids poses major problems for the rational choice of the type of pump capable of working with a nanoparticle concentration difference in a base fluid . In this context, the objective of this work is to study the internal flow in an inter blading canal of a centrifugal pump for pumping fluid nano Al2O3/water to various concentrations. And this through the ANSYS - CFX software, based on the finite volume method. The turbulence of the flow in the inter-blade canal is taken into account using the k-ɛ model. The results obtained show that the addition of nanoparticles in the nano fluid has an appreciable effect on the flow velocity, pressure and shear stresses.

Modeling and Simulation Baed Analysis of Centrifugal Pump Volute Design Parameters by Finite Element Method

Belbachir S., Allali A., Lousdad A., Benguediab M.

Mechanics and Mechanical Engineering

2016

Vol. 20, nr 4

417--424

The performance of pumps are influenced by many factors among which the geometric configuration of the volute. The role of the volute in a centrifugal pump is the transformation of the kinetic energy into pressure with a minimum of losses. The volute is a pump element which is difficult to modify. It must be able to be adapted to impeller with different dimensions. The objective of this work is to investigate by numerical simulation the Von Mises stress distribution and displacements in volutes of different dimension in diameters and width of a centrifugal pump. The study is carried out using finite element method on a three dimensional configuration using ABAQUS code. Only a few attempts of numerical analyses of the mechanical behavior of volute are made. This element plays an important role in the pump adaptation for a given operating conditions by adjusting its dimensions. This activity is conditioned by a good understanding of 418 Belbachir, S., Allali, A., Lousdad, A. E. and Benguediab, M. the design process of the volutes. The obtained results show the modifications of the diameter and the width of the volute have an effect on the values of Von Mises’ stresses and on the displacements. The stresses and displacements reach their maximum with increasing diameters and are inversely for the increase in the width. These dimensional modifications can act indirectly on the clearance at the bec and also on the clearance between the volute exit and the impeller. These are functional clearances which allow the determination of the operating characteristics of centrifugal pumps. With these results substantial improvement on the pump design can be made.