Aerodynamic performance of sidewall shape of boxcar under strong crosswind

作者：Tian Hong-Qi^*; Miao Xiu-Juan; Gao Guang-Jun

来源：Journal of Traffic and Transportation Engineering, 2006, 6(3): 5-8.

• Boxcars
• Crosswind
• Shape
• Vehicle engineering

The transverse force and air lift force caused by strong crosswind are the main factors of train overturning, unloaded boxcar can easily be overturned by strong crosswind because of its large sidewall area and underweight. So flow field numerical computation was completed in order to look for an optimum project of sidewall shape among the upright sidewall, bulgy-arc sidewall and bulgy-slope sidewall, the aerodynamic performance of boxcar suffering from crosswind was studied, such as the transverse air force, air lift force and overturning moment. The result shows the bulgy-arc sidewall and bulgy-slope sidewall can reduce the overturning moment effectively and improve train's stability under strong crosswind to greater extent than the upright sidewall, when the width of boxcar is 3. 2 m, boxcar sidewall with bulgy-arc and bulgy-slope compared with upright, its coefficient of overturning moment decreases to about 21% and the critical wind speed increases to 2.7 m 2· s-1for unloaded boxcar.

• 出版日期2006
• 单位中南大学