Comparison between the 2D axial symmetric model and the 3D model of a safety valve

Safety valves are used as part of the overpressure protection system in various power, process and industrial applications. To investigate the safety valve, analytical model is needed. 2D axial symmetric model is used frequently due to its simplicity. However, the exact solution is obtained by using 3D model, which requires a great deal of analysis time. In this study, comparison between 2D axial symmetric model and 3D model is carried out from the viewpoint of flow capacity. Furthermore, KD(discharge coefficient) is calculated and compared for two guide ring positions