Volume 36, Number 6, December 2018
|Page(s)||1037 - 1044|
|Published online||12 March 2019|
Numerical Simulation and Characteristic Analysis of Ship's Air Flow Field
School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, China
2 Science and Technology on UAV Laboratory, Northwestern Ploytechnical University, Xi'an 710065, China
The air flow field of ship was simulated by using computational fluid dynamics technology to analyze its prime characteristics with reasonable accuracy. The different results of Reynolds-Averaged Navier-Stokes (RANS) method and Detached Eddy Simulation (DES) were compared, and the calculation traits of these methods were discussed. The results show that the air flow field of ship is unsteady. The accuracy of RANS simulation is insufficient for capturing this unsteady phenomenon. However, DES can catch this with better accuracy and expresses a comparatively great conformity with experimental data. Then, the aircraft carrier's flow field was calculated by DES. The characteristics of vortexes and velocity fluctuation on the ideal landing track were discussed in different wind directions. Those simulations indicate that there are complicated vortexes produced by blunt edges of the island and deck in the flow field. Those vortexes interact and mainly exist in the rear of flight deck and its adjacent air wake. Moreover, they cause a conspicuous and periodical velocity fluctuation on the ideal landing track as time goes on.
Key words: ship air wake / numerical method / DES / aircraft carriers / vortex flow
关键字 : 舰船尾流 / 数值方法 / DES / 航母 / 涡
© 2018 Journal of Northwestern Polytechnical University. All rights reserved.
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