为设计一种新型高超声速滑翔飞行器,采用数值模拟方法对HIFiREFlight1所选用的试验飞行器进行改型设计,使其具有良好的气动性能。结果表明:飞行器上表面形状和翼型对其气动性能影响显著,升阻比随上表面迎风面积的减小而升高;当机体不带机翼时,升阻比随马赫数的增加而升高;具有乘波特性的机翼能够给机体提供较高的升阻比;在研究范围内(Ma=4~10),随着马赫数的增加,Model3的升阻比先增大后减小,当马赫数为8时,升阻比最大。

In order to design a novel hypersonic cruise vehicle, the test vehicle of HIFIRE Flight 1 was modified to achieve better aerodynamic performance numerically. The obtained results show that the upper surface and airfoil greatly affect aerodynamic performance of the vehicle. The lift-to-drag ratio increases continuously with the decrease of the area of the upper surface. Furthermore, without the airfoil, the lift-to-drag ratio increases with the increase of the Mach number. The wing with the waverider characteristics provides a larger lift-to-drag ratio. With the increase of the Mach number, the lift-to-drag ratio of Model 3 first increases, and then decreases. When the Mach number is 8, the lift-to-drag ratio is the largest.