The Conceptional Study For The Design Of An Airbreathing Hypersonic Vehicle

This paper mainly uses technology of experiment and method of CFD to make an exploration of aerodynamic performance and whole flow characteristics of hypersonic vehicle which is similar to X-43A. At Hypersonic Aerodynamic Research Center (HARC) of Nanjing University of Aeronautics and Astronautics (NUAA), we use the hypersonic wind-tunnel (NHW) to study the aerodynamic performance of this vehicle model at M7 and M8. The experimental mainly consists of static surface pressure measurements and force measurements. By numerical simulation at M7, and with starting, we simulate the whole flow characteristics and analysis the flow structure and aerodynamic performance. The results are validated using the relational experiment data, and indicate the method of numerical simulation has great precision which can be used in study afterward. Furthermore, we analysis the external flow structure in three-dimensional, and contrast the flow structures of different angles of attack.Moreover, by using the method of numerical simulation, we simulate a new vehicle model which is installed boards at both sides. We analysis the aerodynamic performance and whole flow characteristics of this new vehicle model, and contrast it with normal hypersonic vehicle. The results indicate that after installed the boards the lift will increase correspondingly. This will improve the aerodynamic performance of the vehicle. At the same time, because of the increase of the mass in inlet, the thrust of the vehicle will increase. However, at the same time, the loss of energy will affect the performance, and the weight of the boards will also affects the flight performance of the vehicle.