Modelling and Simulation of the Elasto-Hydrodynamic Behavior of Sealing Gaps
Sprache des Titels:
Sealing gaps are the predominant way to obturate high pressure from low pressure areas in many hydraulic devices, like valves, pumps, etc. In many cases, the elastic deformation of the components forming the gap is minor and can be disregarded. But if very high pressures, small nominal gaps, or flexible components are involved, the elastic deformations may strongly couple with the pressure distribution of the creeping flow in the gap. We will present a method for the efficient treatment of this highly non-linear elasto-hydrodynamic problem. The elastic deformations of the solid bodies are described by an influence matrix, which gives the displacement field as a function of a unit force (or pressure respectively) at a certain (nodal) point. This matrix may easily be computed by a Finite Element program. The coupled problem is treated by numerically solving the Reynolds Equation of the creeping flow - discretized by a Finite Difference method - and the coupled deformation problem. Rigid body motions are considered as well. The highly non-linear influence of the gap distribution, may cause severe numerical troubles unless special methods are applied to cope with this problem. We show the performance of this method by an example.
Sprache der Kurzfassung:
Australian Journal of Mechanical Engineering (formerly Transaction of Mechanical Engineering)
Anzahl der Seiten:
Aufsatz / Paper in sonstiger referierter Fachzeitschrift