Friction Velocity Comparison: Bogie 2 under Blowing Airflow

Figure 9 shows the comparison of the friction velocity on the surface of bogie 2 between the original model and two schemes under a blowing speed of 4 m/s. The blowing airflow changes the flow characteristics in the bogie region, resulting in changes in the friction velocity on the surface of the bogie. Table 3 provides the average in friction velocity on the surface of the bogie's components, it can be seen that the friction velocity of scheme 1 is larger than that of scheme 2. The friction velocity on each damper is higher than that of the original model, this means that snow particles on these components are more likely to experience unstable deposition due to the increased shear forces.