Development of a Two-Dimensional Finite Element Model of a Suction Valve for Reduction of Pressure Pulsation in the Suction Manifold of a Multi-Cylinder Automotive Compressor

摘要

This study uses a two-dimensional finite element model of the suction valve for a multi-cylinder automotive compressor to identify the mass flow rate through the valve. The forced pressure responses in a simplified cylindrical annular suction cavity with area changes are then obtained using the calculated mass flow rate in conjunction with linear acoustic theory and a four pole parameter formulation. The estimated pressure pulsations are compared with the pressure pulsations obtained from experiments. It is shown that the simulation results are in good agreement with the experimental results. It is concluded that a two dimensional finite element model is advantageous to consider various geometries of the valve without the simplifications required in a one-dimensional or single-degree-of-freedom valve model, and that the two-dimensional model also provides better results for the pressure pulsations in the suction manifold.