不同舰船机库外形下艉流场特征数值模拟研究

In order to research the characteristics of frigate ship airwaves influenced by three different hanger shapes for a headwind and the Green 45°case, Computational Fluid Dynamics (CFD) simulations were performed by using Detached-Eddy Simulation method based on Spalart-Allmaras turbulence model with unstructured grids. The results turned to be correct and feasible by comparing with the wind-tunnel data, indicating the capability of DES to resolve the unsteady large-scale turbulent features. The results show that equal height hangar shapes are not conducive to the safety when launching and recovering of helicopters to naval ships, compared by the same hanger height but with both lower sides. By reducing hangar height reasonably, the launching and recovering environment on flight deck could be improved. The results verify the validity of the empirical equation for the prediction of the recirculation zone, and can provide an important reference for the engineering study.