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http://dx.doi.org/10.5293/KFMA.2006.9.5.036

A Numerical Study of Unsteady Wake Flow Characteristics in a Torque Converter  

Won, Chan-Shik (서강대학교 기계공학과 대학원)
Hur, Nahm-Keon (서강대학교 기계공학과)
Publication Information
The KSFM Journal of Fluid Machinery / v.9, no.5, 2006 , pp. 36-41 More about this Journal
Abstract
In the present study, a transient incompressible viscous turbulent flow is simulated for the automotive torque converter with moving mesh technique. For the analysis, entire torque converter flow passages are modeled. Computed torque ratio, capacity factor and efficiency show a good agreement with the experiment data. The flow instabilities characterized by back-flow and wake etc. appeared in some cascade passages are shown to be propagating along tangential direction. These flow patterns are mainly influenced by the pump and turbine blade passing and can't be predicted through conventional steady simulation with a mixing plane approach. The understanding of the unsteady flow characteristics in a torque converter achieved in the present study may lead to the optimal design of a torque converter.
Keywords
Torque converter; Moving mesh; Speed ratio; Torque ratio; Capacity factor;
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