LAUSR

Abstract In order to reduce the aerodynamic drag and aerodynamic heating of the hypersonic blunt body, the aerodisk and spike are installed on the blunt body. In this paper, the influences of the aerodisk on the aerodynamic drag and aerodynamic heating of the hypersonic blunt body are studied by numerical method. The results show that the drag coefficient and maximum heat flux of the blunt body for the configuration with the aerodisk are reduced by 34.09% and 51.06% respectively compared with the configuration without the aerodisk, and the two configurations achieve the drag and heat reduction by reconstructing the flow field. On this basis, multi-objective design optimization of the hypersonic blunt body with the aerodisk and spike is performed by the weighting method and NSGA-II method. The results show that increasing the length of the spike and radius of the aerodisk can reduce total heat flux of the blunt body. The drag coefficient decreases with the increase of the length of the spike. However, with the increase of the radius of the aerodisk, the drag coefficient decreases first and then increases. In addition, the drag coefficient and total heat flux of the blunt body of typical Pareto optimal solution are reduced by 35.90% and 46.97% respectively compared with original design, and adjusting the weighting coefficient of the weighting method can obtain the Pareto frontier calculated by NSGA-II method.