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中文摘要：
在对高海拔地区实测气象数据处理和分析的基础上,针对高海拔特长隧道的实际情况,利用FLUENT流体计算软件对隧道内自然风进行三维数值模拟计算和分析,并与理论计算结果相比较。结果表明：对于数值模拟计算,温度对隧道内自然风风速影响不大,对于考虑温度情况下的隧道内自然风平均风速,理论解和数值解相差在4%以内,在所研究时间段内,隧道内自然风风速一般小于4m/s。考虑温度影响情况下隧道内平均自然风风速为2.52m/s。对于不考虑斜井、竖井和横通道情况下的隧道内自然风计算,建议采用理论公式计算,提高计算效率。
英文摘要：
Base on the processing and analysis of meteorological data measured from high altitude regions, and in view of the current situation of high-altitude extra long tunnel, 3-D numerical simulation and analysis of natural wind in tunnel are conducted by FLUENT fluid calculation software. The results obtained have been compared with theoretical calculation results： for nurrerical simulation, there is little influence to natural wind velocity in tunnel of temperature. Taking temperature into account, the difference of average natural wind velocity in tunnel between theore：ical calculation and numerical simulation is less than 4%. In the time period during study, the velocity of natural wind in tunnel is less than 4m/s, especially when temperature is considered, the average velocity of natural wind in tunnel is 2.52 m/s. For the calculation of natural wind without considering inclined shaft, vertical shaft or cross passage in tunnel, it is suggested theoretical calculation to be used in order to improve computational efficiency.
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