Junqiang Wu

Jun 20, 2023 | mdpi.com | Baowang Li |Xiaobing Wang |Junqiang Wu |Yang Tao

Abstract:To study the aerodynamic characteristics of the convex structure of a surface-monitoring device on a high-speed train and to evaluate its impact on the aerodynamic performance of the high-speed train, numerical simulation research was conducted on three different layouts of the monitoring device. The computational fluid dynamics (CFD) method was used for the simulation study, and the unsteady compressible NS equation was used as the control equation.

Apr 14, 2023 | mdpi.com | Xiaobing Wang |Junqiang Wu |Jianzhong Chen |Yuping Li

Abstract:Cryogenic wind tunnels provide the for possibility aerodynamic tests to take place over high Reynolds numbers by operating at a low gas temperature to meet the real flight simulation requirements, especially for state-of-the-art large transport aircrafts. However, undesirable temperature gradients between the test model and the surroundings will be caused by the thermal non-equilibrium, changing the boundary layer characteristics and resulting in test errors.