护卫舰气流场数值计算研究

Numerical calculation of frigate ship airwake

为了研究护卫舰直升机平台气流场特征,提高舰载机起降安全性,利用FLUENT对孤立护卫舰简化船型SFS2进行数值模拟.计算结果与风洞实验数据对比验证,分析准确计算直升机平台周围气流场特征的数值计算方法.讨论不同网格数量,求解方法对流场计算结果的影响.利用FLUENT的UDF接口,加载在剪切流场中有更好表现能力的LK和MMK湍流模型,提高舰船气流场计算数据准确性.研究表明,气流场计算中使用稳态计算结果可以满足计算精度同时节省计算时间,LK和MMK模型可以更好地应用于护卫舰气流场计算,研究结果可以为气流场工程计算提供重要参考.

To research the characteristics of flow field on the helicopter deck for a frigate ship and improve the safety of takeoff and landing of the aircraft carrier, an isolated simplified frigate ship SFS2 was calculated by FLUENT. The computational fluid dynamics （CFD） results were used to analyze the method to simulate accurately the charac- teristics of flow field around the flight deck through comparing experimental data in wind tunnels. Different grids and solving methods were discussed to analyze the influences on the CFD results. In the midst of FLUENT UDF in- terface, LK and MMK turbulence models, which have better performance in the shear flow, were loaded to improve the calculation accuracy of the flow field data. The results of the study show that, the flow field calculation using the steady-state method could match the computational accuracy with less computation time. LK and MMK models can be better applied to the frigate flow field calculation. The results provide an important reference for engineering calculation of the flow field.