Investigation on aerodynamic performance for a novel wide-ranged hypersonic vehicle

In order to design a novel hypersonic cruise vehicle for a wide-ranged Mach numbers,two different configurations in two situations(Ma=4 and Ma=8)based on the theory of waverider were designed,and then combined to achieve a novel hypersonic vehicle for a wide-ranged velocity.In this study,the commercial software Fluent was employed to numerically investigate its aerodynamic performance and flow field characteristics.The obtained results show that the aerodynamic performance of the novel combined waverider vehicle is better than that of single Mach number waverider vehicle for the wide-ranged velocity.With the increasing of Mach numbers,the lift-to-drag ratio of the novel waverider increases continually,but the gradient decreases.Its maximum value is nearly 3.2,and the value is not lower than 2.6 in the range of design Mach number.The lift-to-drag ratio first increases,and then decreases with the increasing of the angle of attack.When the angle of attack is 3°,the lift-to-drag ratio is the largest.When the Mach number is 6,the maximum value of the benchmark-1 is 4.714,and the value of the combined waverider reaches 3.48.