典型护卫舰飞行甲板空气流场数值模拟

为研究护卫舰飞行甲板气流场特性,获得较高精度的流场数据用于飞行仿真,利用FLUENT对孤立简化护卫舰进行数值模拟.通过合理的网格划分以及对求解方法的验证,讨论了不同网格形式及雷诺数对计算结果的影响,分析了不同湍流模型对于舰船流场计算适用性,准确捕捉了飞行甲板处涡脱落频谱特征,提高了舰船气流场计算数据精确度.研究结果表明,对于一些精确度要求较高的舰船流场计算,ILES模型较为合适.

Numerical simulation of typical frigate airwake on flight deck

To investigate the characteristics of flow field on the flight deck for the frigate ship, and obtain the high accuracy data for the piloted flight simulation, isolated simplified frigate ship was calculated using FLUENT in this paper. Specifically, through reasonable mesh generation and validated solving method ,the impact on the calculation results with different grid forms as well as the Reynolds number was discussed, and the simulation applicability of different turbulence models for ship flow field was also analyzed. The spectral characteristics of votex shedding on the flight deck were captured accurately and calculation data accuracy for ship airwake was improved significantly. The results show that ILES model is more appropriate for the ship flow field simulation with higher accuracy requirements, and the numerical simulation method for ship flowfield also provides an important reference for engineering applications.