Numerical Simulation Of Gas-solid Flow Stirring Cycle In The High-speed Railway Bearings Testing Bench

High Speed Rail bearing test rig is an important equipment for high-speed rail bearings tested to verify the performance parameters of an analog high-speed rail bearings actual working conditions and associated tests of the key, so study and master the high-speed railway bearing test rig autonomy is essential to achieve high-speed rail bearings made step. Only bearing test rig prior analog high-speed rail bearings actual operating condition of the flow field can be more accurate test the performance of high-speed rail bearings, agitation cycle is a high-speed railway bearing test rig to simulate high-speed rail bearing a live state flow field, the subject of both a stirring cycle on the basis of the high-speed railway bearing test rig to simulate the gas-solid two-phase flow analysis.Firstly, topics bearing test rig domestic status quo and gas-solid two-phase flow of high-speed rail, and then combined with the actual working conditions of its internal structure, to simplify the structure of the test bed to analyze the flow field obtained high-speed rail bearing dust distribution of the actual operation, to determine achieve its agitation cycle solutions and classification. Secondly, establish fluid model and fluid model using ICEM meshing preliminary analysis. Again, through the agitation cycle to achieve the spatial arrangement of the built-in fan, turn the fan, fan deeply classified simulation parameters three aspects, the subsequent processing of vector analysis, speed, flow lines and other graphics to explore the gas-solid high-speed railway bearing test rig agitation cycle variation under steady-state two-phase flow, agitation cycle bearing test rig program is designed to provide the theoretical basis for comparison drawn closer to the high-speed rail bearing live agitation cycle program that is closest to the measured bearing test rig in live in a fluid state. Finally, the steady-state size of the particles under different conditions and different fan speed tracking analysis, motion and bearing dust particles can be surrounded by a more uniform and as an indicator, summed variation of dust particles and fan speed internal agitation cycle affect the flow field, acting on test bench design, and then the simulation analysis of transient do additional analysis.Based on SST analysis shows that the theoretical foundation of fluid turbulence model and the use of CFX software systems can be more intuitive analysis of the bearing test rig gas-solid two-phase flow under different classification schemes dust fluid distribution, the results show that when the test bed for the cylindrical when the wall is smooth, measured from the fan4is disposed on the bearing100mm420mm circumferentially adjacent to each other across the two opposite turning, for the flat plate blade angle of60°, an ideal size to be able to realize the high-speed130mm stir bearing test rig inside the loop, you can provide a theoretical basis and reference for the establishment of high-speed data bearing test rig.