All rights reserved by www.ijaresm.net ISSN : 2394-1766 1 SUBMERSIBLE PUMP DESIGN EVALUATION & PERFORMANCE PREDICTION USING CFD Kiran Patel EnCore Consultancy Services, Vadodara, Gujarat, India Abstract:Submersible Pump design is consists of two parts, one is hydraulic design and other is mechanical design of various components. Pump performance is mainly depending on hydraulic design ofimpeller & bowl. Computational Fluid Dynamics (CFD) is very much useful tool for evaluation of hydraulic design of impeller & bowl. Present paper objective is to evaluate the submersible pump hydraulic design and predict the performance characteristics. Cavitation analysis of impeller is also conducted and NPSHr of impeller is predicted. Keywords:Bowl, CFD, Cavitation, Impeller, Submersible Pump. INTRODUCTION The Computational Fluid Dynamics (CFD) is the present day state-of-art technique in fluid engineering flowanalysis.It has wide range of applications-like pumps, fans, compressors, turbines, automobiles, processindustries, aerospace, in fact in any areas of study, where there is fluid in motion, air, water, steam etc.CFD analysis is very useful for predicting pump performance at various mass-flow rates. For submersible pump designers,prediction of operating characteristics curve is most important. All theoretical methods for prediction ofefficiency merely give a value; but one is unable to determine the root cause for the poor performance. Dueto the development of CFD code, one can get the hydraulic efficiency value as well as observe actual behavior. Onecan find the root cause for poor performance by using CFD Analysis of equipment.Submersible pumps are widely used for water transportation in irrigation, house hold application and other industrial applications. Their operating range spans from full-load down to close to the shut-off head. In order to developa reliable machine for this highly demanding operation, the behavior of the flow in the entire pump has tobe predicted by a reliable computational method.For pumps, important questions are-to what extent can the current 3D Navier-Stokes design tools be used toidentify the onset of instabilities in the flow, and how accurately can the pumps characteristic be predicted.Steady state simulation is used for the prediction of the flow in the single stageand entire machines in the design process. However, due to unsteady effects, it is difficult to predict thepump characteristic correctly. Unsteady effects in turbo machinery, include the interaction of the rotor andstator, the surge and stall limits in compressors, and the instabilities in pumps. The comparison of theexperimental data and the results of the steady and unsteady flow simulations show the capability ofmodern CFD codes.
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All rights reserved by www.ijaresm.net ISSN : 2394-1766 1
SUBMERSIBLE PUMP DESIGN EVALUATION &
PERFORMANCE PREDICTION USING CFD Kiran Patel
EnCore Consultancy Services, Vadodara, Gujarat, India
Abstract:Submersible Pump design is consists of two parts, one is hydraulic design and
other is mechanical design of various components. Pump performance is mainly depending
on hydraulic design ofimpeller & bowl. Computational Fluid Dynamics (CFD) is very
much useful tool for evaluation of hydraulic design of impeller & bowl. Present paper
objective is to evaluate the submersible pump hydraulic design and predict the performance
characteristics. Cavitation analysis of impeller is also conducted and NPSHr of impeller is