Numerical Simulation And Optimum Geometric Parameters For Controllable Film Liquid Hydrostatic Pressure Seal

As one of the classical seals, controllable film liquid hydrostatic pressure seal is used in many important situations, such as in main pump seal of nuclear power station. This seal face is designed to special geometric shape. The clean pressure fluid flows into the structure, and forms one layer of hydrostatic liquid film. The hydrostatic liquid film can lubricate and cool the friction pair sufficiently, so that to keep the seal stable running. The liquid film between the seal face is high stiffness and the working performance is stable. It is very important in project application area. Furthermore, there are few papers reported the flow field of the fluid film.Therefore, on the basis of investigations of plenty of literatures about controllable film liquid hydrostatic pressure seals, the important task of this paper is on the basis of computational fluid dynamics and numerical, from the full governing equations of the fluid mechanism, founded on the finite volume method (FVM), used the famous software FLUENT, establishes the three-dimensional model, meshes the model, researches and simulates the fluid field of the controllable film liquid hydrostatic pressure seal, gains hydrostatic pressure distribution and velocity vector distribution, discusses the influences of parameters(the face geometric parameters and working parameters changes on the sealing Performance, gets some conclusions which can guide the project design. The parameters used in numerical simulation calculation comes from actually engineering project and also belongs to the range of optimal values,which this paper gets through dimensionless method. Meanwhile, Taguchi orthogonal experiment is designed to optimize the face parameters, and gets the optimal combination between different parameters. Using the optimal parameters combination, the result of the simulation verifies promoting the sealing performance. Through comparing the simulation results between optimal parameters and project parameters, it proves that Taguchi orthogonal experiment was reasonable...