Zhi Chen , Liang Zhang and Qingqing Zhang
DOI Number XXX-YYY-ZZZ
Conference Number HiSST 2018-1129
The hypersonic wake flow structure of a sharp cone with different angle of attack was investigated numerically. By comparing with the 0°angle of attack case, the influence of angle of attack on wave and vortex structure was examined. For the non-zero angle of attack cases, the recirculation zone shape is of complex three-dimensional shape and there is a local minimum of recirculation region length at the z=0 plane, while two maximums exist symmetrically about the z=0 plane, in contrast with the axisymmetric shape of non-zero angle of attack case. Two sets of vortex surfaces exist in the near base region and the windward one is smaller than the leeward one because of compression from the windward flow. These vortexes interact with each other and create complex compression and expansion waves in the base region. The length of recirculation region shows a non-linear change of the recirculation region length with the increasing of angle of attack. At small angle of attack, the recirculation region decreases with the increasing angle of attack, but when the angle of attack exceeds the half angle of the cone, the vortexes generated by the forebody interact with wake vortexes and transporting kinetic energy from the forebody region to base region and increase the length of recirculation region