Fang Juan1, Hong Yanji2, Huang Hui2, Li Qian2, Liu Zhun1

It is a new concept to reduce the wave drag of hypersonic vehicles by laser plasma, where the ignition location is an important research parameter. A second-order accurate scheme based on finite volume method and domain decomposition of structural grid is used to compute the influence of ignition location on drag reduction at Mach number of 6.5 and flight height of 30 km. The results show that laser plasma can effectively reduce hypersonic blunt body vehicle’s drag. When the ratio of the distance between ignition location and stagnation point to vehicle diameter is 2, the reduction effect is the best, and the results of numerical simulation and theory are consistent．