Abstract: The full-size high-speed train head and flow field around were modeled to simulate the turbulent air flow and aerodynamic noise. The external steady flow field was computed using the Realizable k-ε turbulence model. Based on the steady flow field， aerodynamic noise sources on the train head surface and the external transient flow field were calculated by broadband acoustics source model and large eddy simulation (LES)， respectively. The fluctuating pressures on the train surface were obtained from the results of the transient model. Considering the transient flow field， the far-field aerodynamic noise of the train head was finally obtained based on Lighthill acoustics analogue theory. The simulated aerodynamic noise was compared with the on-line test result to validate the simulation， and they have a good agreement.

Key words: high-speed train, aerodynamic noise, Lighthill acoustics analogue theory, simulated analysis, on-line test