【摘要】 提出利用智能可变形材料,通过喷管喉道变形,实现喷管的推力矢量控制。将标准的k-ε双方程湍流模型进行可压缩性修正,对喉道二次流矢量喷管进行了数值模拟,并与实验结果进行比较,发现可压缩修正的k-ε双方程模型较标准k-ε模型、单方程模型具有更好的计算结果;同时,利用修正的湍流模型对基于喉道智能变形的推力矢量喷管进行数值模拟,结果表明该推力矢量控制方法较喉道二次流推力矢量喷管具有更好推进效率,但推力矢量角度控制范围降低。更多还原

【Abstract】 A thrust vector control method,obtained through the nozzle throat deformation with the intelligent material,is presented in this paper.To test the modified turbulent model,A computational simulation of the secondary inject thrust vectoring nozzle,using the K-epsilon Turbulence Model with a compressibility modification,is conducted.It shows that the simulation achieved with the modified model has a better accordance with the experimental results than that got with the single equation model and the standard k-epsilon model.Besides,a computational investigation of the throat deformation nozzle is conducted using the modified model.The result indicates that the throat deformation nozzle has a higher thrust ratio,but smaller vectoring angle range,compared with the throat secondary inject thrust vectoring nozzle.更多还原