Aerodynamic Optimization of the Head Shape of a High-speed Train Based on Adjoint Method

The adjoint optimization method has been well developed and applied in the field of aviation. In this paper, the adjoint method is used to optimize the head shape of a simplified high-speed train, and the feasibility of this method in aerodynamic shape optimization of high speed-trains is discussed. The optimization results show that the aerodynamic drag coefficient of the optimized train is 0.9% lower than that of the original one, while the main feature of the head shape is not changed significantly. The adjoint method has important engineering application value in the aerodynamic optimization of high-speed trains.