Numerical Study on the Anti-Snow Performance of Deflectors on a High-Speed Train Bogie Frame

In this paper, a new installation of flat plate deflector which attached on the bottom of the bogie frame is proposed and its anti-snow accumulation performance with different attack angles is numerically studied. The wind-snow two-phase flow in the bogie region is simulated based on the Reynolds Averaged Navier-Stokes (RANS) equations combined with the Realizable "k-ε" turbulence model and the Lagrangian particle phase method. The adopted numerical simulation methodology is verified and validated by comparing with previous wind tunnel tests. In this paper, three typical attack angles (۳۰°, ۶۰°, ۹۰°) for deflector are studied. The results show that: the ۳۰° case has a medium influence on the flow field and reduces snow accumulation by ۳۵.۱۴%; the ۶۰° case guides the high-speed airflow downward and has the best effect with ۶۲.۴۶% reduction in snow accumulation; the ۹۰° case has the smallest reduction with ۲۰.۳۰% in the mass. Overall, all deflectors with three different installation angles can reduce the mass of snow accumulated on the bogie surface.

کلیدواژه ها:

Lagrangian particle phase ، Snow accumulation ، snow two ، Wind ، speed train bogie ، Phase flow ، High