Numerical Simulation and Evaluation of the Oil Film Flow Field in Hydro-Viscous Drive

To reveal the characteristics of the pressure field, velocity field, and the streamline oil film between the friction pair in hydro-viscous drive (HVD), three-dimensional physical models of the oil film between the parallel and deformed interfaces were established, and were solved based on the principle of computational fluid dynamics. Research results demonstrated that the dynamic pressure goes up gradually along the radial direction; at grooved zone the dynamic pressure is higher, and the maximum appears near the groove side; the dynamic pressure between deformed interfaces is lower than that between parallel interfaces, and the lower dynamic pressure causes the hydrodynamic load capacity decrease; the velocity of the oil film increases along the radial direction, and that between deformed interfaces is higher, so it has better cooling effect; and the streamline of the oil film at grooved zone is radial flow, while at ungrooved zone which is three dimensional parabolic flow.The numerical simulation results have important significance to the futher theoretic research and engineering application of the HVD technology