The Performance Study Of Traction Ventilation System Of A160km/h AC Drive Passenger Locomotive

In the operation process of locomotive, traction motors continuously provide power for locomotive which are the key component to assure its running safely and reliably. Under the locomotive’s development direction of high speed and heavy load,power density of traction motor is increasing constantly, thus leading to the higher requirements about its cooling effect and heat dissipation performance. Therefore, it is particularly important to design a cooling ventilation system which has a reasonable structure. In recent years, with the continuous development of CFD technology, it can be applied to the design of traction ventilation system to make up for the defect of traditional empirical design, making the design process comprehensive.This paper based on a certain160km/h ac drive passenger electric locomotive’s traction ventilation system, uses3d modeling software I-DEAS to establish the calculation model of the flow field of traction ventilator, the calculation model of traction cooling path, the calculation model of whole traction ventilation system respectively. Makes a numerical calculation on the flow field, which in traction ventilation system by utilizing ANSYS FLUENT software to obtain its distribution of internal flow parameters, including velocity vector picture of the flow field and pressure contour of the flow field etc. Though the analysis of the flow parameters, it shows that the distribution of flow field in the traction ventilator is reasonable and consistent with the working principle of axial ventilator; the local position of traction cooling path has phenomenon of flow disturbance, flow separation and backflow, its flow distribution of each outlet is non-uniform,the maximum difference value is33.8%. Meanwhile,comparies numerical simulation results with test data, one can finds out that their trend are anastomotic, which verifying the reliability of numerical simulation by this comparision.As for the problem that the flow distribution of each outlet is non-uniform and doesn’t meet the design requirements, takes the sum of squares of each outlet’s mass flow as objective function and selecting Powell optimization algorithm to make a structural optimization for traction cooling path.In the optimization region, to find out the optimum structure of traction cooling path which make the mass flow of each outlet distributed uniformly and the backflow situation improved obviously. The research results of this paper provides some reference for the design of traction ventilation system.