Fluid structure Interaction of Traversing System in Shear Layer

Abstract:

Based on a combination of numerical simulation and wind tunnel, flow behavior of the traversing system was investigated and the feasibility of numerical method was proved. The aerodynamic forces acting on the traversing system under different situations were calculated. It is found that with the increasing of the distance between the traversing system and the nozzle, the force increases, and the growth rate peaks at a distance of 5 m. Based on the method of fluid structure interaction, it is found that the maximum unsteady lift force is larger than the average forces, which is about 3 times. The single frequency characteristic isn’t found at the power spectral density of drag and lift forces. High amplitude occurs at the frequency from 2 to 60 Hz, which is easy to lead to resonate the traversing system. It must cause a severe vibration of the system, which results in the inaccuracy of the automotive wind tunnel test data.