Flow Field Analysis And Structure Optimization Of Automotive Electronic Water Pump Based On CFD

With the development of economy and social progress,new energy plays an important roles in our life,in recent years,the market share of new energy vehicles continues to improve,and the automotive electronic water pump as the core component sized system,its work efficiency will directly determine the level of new energy vehicles.In the automobile cooling system,because of the disadvantages of traditional mechanical water pump,such as high noise,short life and large energy consumption,the automobile electronic water pump technology controlled by intelligent control system is becoming more and more mature,equipped with electronic water pump new energy vehicles,can more reasonably distribute the working hours of cooling pumps.The disadvantages of early operation and lag cooling of mechanical pumps can be precisely avoided.However,the efficiency of electronic water pump of new energy vehicles determines the overall development level of new energy vehicles,and it is very important to study an optimization method that can improve the efficiency of electronic water pump of new energy vehicles.In view of the above problems,according to the performance parameters of a given automotive electronic water pump design and optimization of the automotive electronic water pump centrifugal pump part,the main work is divided into the following parts: The first part,it analyzes the current situation of domestic and foreign development of automotive electronic pumps,combined with the current research status quo and the existing working conditions at home and abroad,puts forward a partial optimization plan for automotive electronic pump centrifugal pump;The second part,it analyzes the theory and method of centrifugal pump design,selects the velocity coefficient calculation method to design centrifugal pump impeller and worm shell structure.The centrifugal pump part is modeled in 3D;The third part,the centrifugal pump part is numerically simulated using Pump Linx post-processing software,and the residual curve and convergence result are obtained by mesh irrelevant analysis,boundary conditions and select solver calculation;The fourth part,based on the MATLAB genetic algorithm toolbox,and based on the main parameters of centrifugal pump impeller and snail shell as the optimization variable,the sub-target function of energy loss,anti-cavitation performance and stability is established,and a better set of parameter combinations is obtained.By comparing and analyzing the cloud map such as the pressure velocity of the model before and after optimization,the flow change of the internal flow field of the centrifugal pump before and after,and the test of the prototype,is obtained.The data of centrifugal pump performance test data are obtained,the external characteristic curve,flow head and flow efficiency curve of the original model and the optimized model are drawn,and the match between numerical simulation and test data is compared,and the accuracy and reliability of the optimization results are verified.Through the numerical simulation and structural optimization of the centrifugal pump part of the automobile electronic pump,the key technologies are analyzed and solved,the structure of the centrifugal pump impeller and the worm shell is optimized,so that it has a better set of parameter combinations,and the optimization results are related to the analysis and verification,with strong practicality.It provides reference and basis for the optimization of the structure of the automotive electronic pump centrifugal pump,and promotes the combination of intelligent optimization algorithm and centrifugal pump structure optimization.