基于CFD的变后掠翼单速度最优后掠角预测模型

为延长飞行器续航时间,探索变后掠翼飞行器控制规律,根据新型变后掠翼飞行器模型,探究了通过飞行器速度及迎角来控制弹翼后掠角度,以达到最优气动性能,从而使该飞行器获得更长续航力.选取飞行马赫数为0.4～0.8、前缘后掠角度为15°～45°内的39个关键点,在迎角为0°～14°范围内进行CFD仿真,将仿真结果在不同数学模型下...

Prediction Model of the Optimal Swept-Back Angle for the Aircraft with Variable-Sweep Wings at Single Speed Based on CFD

In order to prolong the endurance time and explore the control law, a new model of variable-sweep wing aircraftis used to investigate the optimal swept-back angle of the wing according to the aircraft speed and angle of attack toachieve the optimal aerodynamic performance and thus the longer endurance of the aircraft. 39 key points are selectedwithin the Mach number of 0.4 to 0.8 and leading edge swept-back angle of 15° to 45°, and CFD simulation are performedwithin the angle of attack of 0° to 14°. The results are fitted under different mathematical models and it is found that thequartic polynomial at single speed is the most approximated model. Based on this, a prediction model of the optimal swept-back angle for the aircraft with variable-sweep wings at single speed is proposed, it is also verified that the model can con.trol the theoretical error within 3%.