Abstract: The unstructured grid and the RSM turbulence model are used to simulate the flow in a curved pipe. The measurement is also carried with the help of the 3D LDV. The results of the numerical simulation are coincided with the experimental data well. A dual-loop rectifying device is developed. The numerical simulation and the experimental measurement are both applied to the flow with the new device. The results show that the new device can be used to get good profile of the flow and make the flow be homogeneous and steady in the backward position of the curved pipe.

Key words: Rectifying device, RSM Inhomogeneity, Three-dimensional curved pipe