Numerical simulation of 3D periodic flow in fluid couplings
Adequate understanding of the flow field in fluid couplings is necessary for the optimized design of such devices. In a fluid coupling torque is transmitted by fluid circulation due to a speed differential between the rotating pump impeller and a matching turbine runner. The structure of the flow field is very complex and detailed studies of the unsteady 3D flow have never been reported. A finite-volume method with non-staggered variable arrangement has been used to solve the unsteady Navier-Stokes equations on boundary-fitted grids and for a rotating frame of reference. The obtained results give insights into the physical process of torque transmission.
KeywordsControl Volume Axial Velocity Fluid Coupling Pump Impeller Ekman Number
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