航母气流场数值模拟方法研究

Study on Numerical Simulation Method of Aircraft Carrier Airflow Field

由于航速、来风,以及船体运动,航行于海洋环境中的航母船体与上层建筑会影响其气流场,从而影响载机的起降安全.文中分别以载机舰船简化模型及俄制库兹佐涅夫航母为对象,通过数值模拟对比探讨了网格类型、网格密度,以及湍流模型对气流场数值预报结果的影响;并基于数值结果分析了关键位置的流场变化及其对舰载机气动特性的影响.数值模拟结果表明:应用Poly-Hexcore类型的网格在载机舰船气流场数值预报应用中可有效平衡数值求解效率与精度的矛盾,而DES模型较RANS模型在流场细节捕捉方面有较大优势.

Due to the speed,incoming wind and hull movement,the hull and superstructure of aircraft carrier sailing in the marine environment will affect its airflow field,thus affecting the take-off and landing safety of aircraft carrier.In this paper,the simplified model of carrier ship and Russian Kuznetsov aircraft carrier were taken as objects,and the effects of grid type,mesh density and turbulence model on numerical results were compared by numerical simulation.Based on the numerical results,the change of flow field at key positions and its influence on the aerodynamic characteristics of carrier aircraft were analyzed.The results show that the application of Poly-Hexcore mesh can effectively balance the contradiction between the efficiency and accuracy of numerical solution in the application of numerical prediction of aircraft and ship airflow field,and DES model has greater advantages than RANS model in capturing flow field details.