| The ever-increasing communications between countries boosts the air traffic flow, and also the traffic jams and security problems. Wake vortex is one of the most important factors leads to the both problems. The characteristics of wake vortex are needed to be research, in order to solve the problems. Numerical simulation is used to simulate the evolution of wake vortex, in order to research the crosswind's effect on the parameters of wake vortex. Wake vortex software is used to analyze the relationship between wake vortex parameters and environmental factors.The research and analyses about wake vortex with different numerical simulation model, and compare the experimental results with wind tunnel testing, shows that Realizable k-? is the best model to agree with the wind tunnel data, therefore Realizable k-? model is used in the numerical simulation. Since the ANSYS software can't be used to quantitatively analyze the results, so a designed software with MATLAB is used to research and analyze the numerical simulation results. On the base of research actuality, selective analyze the typical environment factor crosswind, the crosswind of 2m/s and 5m/s is used to research the influence of crosswind on wake vortex, including the coordination of wake vortex core, the vorticity of wake vortex core,axial velocity,the radius of wake vortex, tangential speed and circulation etc. |
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