Numerical Simulation On Water Side Heat Transfer Characteristics Of Louver Heat Sink Used On Electric Locomotive Transformer

China's vast territory and abundant resources,but the distribution of natural resources is uneven,resource-based goods producer and market are often has large geographical space division,As a result,with the rapid development of economic,China's bulk cargo transportation demand like energy and raw materials and other resources become higher.However,in order to realize the heavy load transportation,the traction locomotive with higher power is the necessary condition.The operation environment of electric locomotive is bad,The air often contains metal particles,acid alkali salts substances and duct clogging dust,Piaoxu what will cause corrosion of the aluminum radiator,if the maintenance is poor in the operation process of the radiator,it very easy to cause the wind side baffle plate corrosion,leakage.Therefore,to improve the efficiency of the heat sink,it will not be a good idea to make the air side fin more complex and increase the difficulty of maintenance,the air side finned corrosion failure probability increases,the optimal water side fin-louver fin is a practical and feasible approach.This paper made use of the related CFD software,built the model for grid independence verification firstly;referred to the test data of relevant literature to establish the simulation model and did the numerical simulation,and then compared the simulation results with experimental results to prove the correctness of the model and the feasibility of numerical simulation technology that applied to the research of louvered fin radiator performance optimization.At last,the single factor optimization method and orthogonal test method were used to optimize the performance of the louvered fin radiator.The single factor optimization method were used to study the louver fin single structure parameters such as fin pitch,louver pitch,louver angle,fin height,fin thickness's effect on the performance of the heat exchanger,and made a analysis.Through the introduction of the comprehensive performance of radiator evaluation factors,obtained the optimal value of each parameter of the structure in the range of my study:fin pitch _pF=2.6mm?louver pitch _pL=3.6mm?louver angle_?L=19°?fin height _hF=3.2mm?fin thickness F_th=0.35mm?.In order to obtain the optimal structure parameters of louver fin radiator in my research scope,based on the optimal value,orthogonal test method was used to do the overall optimization of the five structural parameters:using orthogonal design method to build orthogonal test scheme which contains five factors and five levels,and all of 25 structure parameters is studied by numerical simulation and get the influencing order of five factors for the performance of the radiator:F_th>F_p>F_h>L_?>L_p,besides,obtained the optimum combination of structural parameters.At last,we carried out the verification experiments,compared the experimental group which has the best comprehensive performance in the orthogonal test scheme namely the second group with the selected group obtained via analysis and calculation,and the group which was obtained by calculation and analysis ultimately proved to be have the optimal comprehensive performance,namely fin pitch _pF=2.4mm?louver pitch L_p=3.5mm?louver angle_?L=19°?fin height _hF=3.1mm?fin thickness F_th=0.32mm?...