Flow Characteristics And Optimization Analysis Of TPA90S Centrifugal Pump

With the reduction of the global resource storage,Energy problem has become a prominent problem related to the development of national economy.Centrifugal pump is a kind of high energy consuming mechanical device.It is of great significance to understand its operating mechanism and improve its operation efficiency.In this paper,the main analysis of TPA90S centrifugal pump is as follows:?1?The UG software was used to complete the model of centrifugal pump blade and volute.Central hexahedron was used to reduce the number of unstructured meshes,which would reduce the number of grids and increase the speed of operation while ensuring the quality of the grid.?2?In order to understand the internal flow of centrifugal pump,the N-S equation and standard k-? turbulence model was used to establish a centrifugal pump mathematical model.And the finite volume method was used to simulate the internal flow of the TPA90S centrifugal pump,analyses five kinds of different working conditions by steady flow simulation method and unsteady flow simulation method.Centrifugal pump static pressure from the impeller import to the volute export increase gradually,and turbulence was prone to occur at the interface area,while the tongue area had a pressure drop process.Based on the simulation of unsteady flow to analysis the variation of internal flow velocity and turbulent kinetic energy.Comparing the calculation efficiency and the head with the experimental results,founded that the unsteady flow simulation can simulate the internal flow of the centrifugal pump better.?3?A one-way fluid structure interaction between the pump blade and water was carried out,and used data of internal flow simulation flow pressure to the surface of blade as a load,then analyzed the load and deformation effect of the blade.The results showed that the maximum equivalent stress of the blade decreased with the increase of flow,and the maximum total deformation of the blade decreased firstly,then increased with the increase of flow.?4?The minimum total loss of centrifugal pump was used as the first sub-objective function,the minimum NPSH as the second sub-objective function,and to eliminate the hump of the lift curve as the third objective function.Three objective functions were combined using a linear weighted sum method to establish a multi-objective optimization mathematical model.D₂,₂b,?₂,₁D,₁b,?₁,z were used as the design variables,then objective functions was optimized with MATLAB Toolbox.The results showed that the efficiency of centrifugal pump was increased,NPSHr and head curves hump were decreased.