标题：Research on aerodynamic characteristics of van out from road tunnel under crosswind
作者：Li, Dong; Yuan, Xiule; Du, Guangsheng
作者机构：[Li, Dong; Yuan, Xiule; Du, Guangsheng] Shandong Univ, Sch Energy Power Engn, Jinan, Peoples R China.
会议名称：2nd Conference of Global Chinese Scholars on Hydrodynamics (CCSH '2016)
会议日期：NOV 11-14, 2016
来源：Proceedings of the Second Conference of Global Chinese Scholars on Hydrodynamics (CCSH'2016), Vols 1 & 2
关键词：crosswind; van out from road tunnel; aerodynamic characteristics;; transient numerical simulation
摘要：A mesh updating method is adopted which based on dynamic layering technique in this paper. The aerodynamic characteristics of vehicles out from road tunnel under crosswind and the causation between the flow phenomenon and the results of mechanical has been studied by setting four pairs of running speed and any running speed corresponding four pairs of wind speed to analyse the aerodynamic characteristics of a van out from road tunnel under crosswind. The aerodynamic drag coefficient of the van decreases when running out from the tunnel, the drag coefficient will increase when the wind speed grows. The aerodynamic characteristics of the van seriously fluctuates near the tunnel's exit and fluctuation became more obvious when the wind speed increased. The flow field around the van become more complex and effect the safety of driving.