摘要
为深入研究山体坡度对山体周围环境风的影响,基于计算流体力学理论,选择Fluent仿真环境建立高度相同、坡度不同的二维余弦山体模型进行数值风洞试验.依据高速公路与山体的空间位置关系以及常见车型的风压中心高度,定量研究了山体坡度与山体周围高速公路路面环境风的关系.实验结果表明,山体顶端和山体下游区域是山体周围环境风的局部极大值点,并通过数据分析和曲线拟合得到了相应的拟合公式.实验结论揭示了途径山体的高速公路路面环境风受山体坡度变化的影响规律,为三维山体建模仿真参数的确定提供了依据,可为"风-车-路"系统的深入研究、待建高速公路的选线以及运营高速公路的风速预警系统提供理论和技术支持.
To research the influence of the terrain slope on the wind velocity and freeway driving safety in the hilly area, 2-D cosine hill models were established based on the theory of computational fluid dynamics. These models used to simulate the characteristics of wind velocity around the hills in different slope condition. According to the experimental results, two dangerous freeway locations where the wind-induced accident may most likely happen are analyzed at the height of the common vehicles＇ wind pressure center to research the driving safety. Fitting formulas are proposed based on the analysis of the experimental results. The conclusions provide a theoretical basis for the further re- search of 3-D hill simulation and ＂wind-vehicle-road＂ system. Moreover, the results are also useful in the field of highway design and operation safety management.
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第1期201-206,共6页
Journal of Southeast University：Natural Science Edition
基金
国家自然科学基金资助项目(50708020)
东南大学优秀青年教师资助计划资助项目(2008)
关键词
环境风
山地
数值风洞
行车安全
计算流体力学
terrain wind
hilly area
numerical wind-tunnel
driving safety
computational fluid dynamics
