Abstract:
A large amount of research work has been conducted on the design of high speed waveriders and engine inlets based on the streamline tracking method, but the integrated design of the forebody of hypersonic vehicles and the scramjet inlet has always been difficult. In order to improve the total pressure recovery and flow capture performance of the integrated forebody and inlet of hypersonic vehicles, the entire base flowfield is divided into a shock compression and an isentropic compression in sequence based on the methods of previous waverider forebody design and inlet compression surface streamline tracing, and a completely continuous streamline tracing is achieved connecting the forebody shockwave, the outer compression surface, the inner compression surface of the inlet, the reflection shockwaves and the inlet throat. The generation of the three-dimensional spanwise surface is controlled by a osculating method, which realizes the design of continuous stream surface. The longitudinal base flowfield is constructed by combining the shock compression flowfield generated by the cross-marching characteristic method with the isentropic compression flowfield generated by the reversed Prandtl-Meyer flow, which only requires constrains of the forebody shockwave shape and the inlet throat. All control lines are described by a kind of quartic spline curve. This is a unified method for the integrated forebody and inlet design of hypersonic vehicles based on reference flowfields of the internal and external cones. Its main advantages are that it has relatively higher flow capture and total pressure recovery coefficients and can be widely used in the integrated design of internal and external flow of hypersonic vehicles.