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Vehicle driveline torque converter is one of the components of the transmission , and its main role is to automatically adapt to changes in load , changing torque , and can be achieved within a limited range of the automatic transmission . Sheet metal working hydraulic torque converter with its good performance , suitable for mass production , etc. foundry gradually replace the torque converter , but the sheet metal design and manufacturing hydraulic torque converter difficult . Torque converter modern design theory suggests that the design of advanced torque converter product key is to thoroughly examine its internal flow state. This paper first introduces the basic equations of fluid flow , several common turbulence model, the flow field of the algorithm, as well as meshing basic theory and methods . A model for an existing sheet metal hydraulic torque converter , its structure will be simplified , with UG and Gambit software to obtain each work rotation channel grid model , combined with modern hydrodynamic theory, fluid simulation software FLUENT various working Road turns in different conditions has been calculated , obtained under various conditions of flow channel structure each point on the pressure, velocity and other physical values. Then three typical operating conditions, analysis of the pump wheel, turbine , pressure inside the guide channel rotation , speed, flow lines imported surface characteristics and formation mechanism , and the flow field characteristics were analyzed. Finally, the torque converter performance test, analysis of the traditional performance test rig , set up a new test bed for sheet metal hydraulic torque converter for the basic performance tests. Test results and simulation results are basically consistent . Through the sheet metal type torque converter comprehensive analysis of the flow field , the following conclusions: internal high- speed torque converter , pressure gradient , and the return of the secondary flow , vortex flow effects such as abnormal torque converter performance , especially for the torque converter efficiency significantly affected by further improving the torque converter pump wheel , turbine , the internal structure of the guide wheel to get a steady pace , pressure distribution , eliminating the abnormal flow of the flow field in order to improve the torque converter performance ; article torque converter used to simulate the flow field theories and methods that can get a better torque converter internal flow state , sheet metal hydraulic torque converter can provide a theoretical basis for improvement .
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