【作者】 丁翠；

【导师】 何学秋； 聂百胜；

【作者基本信息】 中国矿业大学（北京） ， 安全技术及工程， 2013， 博士

【摘要】 本文实验研究了正常通风时期小尺寸规则巷道内风流的分布规律,并基于流体力学理论提出了风速分布“关键环”和“特征环”的概念。同时数值分析了同尺寸巷道内风流分布规律,并进行了实验对比验证,模拟与实验结果符合良好,并由此分析得到规则截面上“关键环”的特征方程。此外进一步数值研究了正常通风时期大尺寸不规则三心拱巷道内凸凹体尺寸及通风风速对“特征环”及“关键环”的影响规律,得到了“关键环”在凸体截面上的适用条件。同时,研究了火灾时期大尺寸三心拱巷道内火灾强度以及通风风速对温度场及流场的影响,得到了火灾期间“特征环”、“关键环”的分布规律及“关键环”在火灾时期的适用范围。探讨了“关键环”在巷道风量动态监测中的应用。研究成果为实现井下平均风速及风量的准确测量提供了新的理论支撑和技术手段,具有较大的实践应用价值。更多还原

【Abstract】 In this paper airflow distribution in small size rules tunnel at period of normal ventilation is researched by experiment. Based on hydrodynamic theory and experimental results, wind distribution characteristics on cross-section are analyzed. Then two new concepts of "characteristic ring" and "key ring" are proposed. Airflow distribution status in rules tunnel which is with the same size of experimental tunnel is simulated. The accuracy of simulating ventilation in tunnel is verified by experiment. According to quantitative analysis of the simulation results, the characteristic equations of "key ring" in rules tunnel are obtained. Based on the above research, airflow distribution in irregular heart arch-sectional tunnel at period of normal ventilation is researched by numerical simulation. Conditions of using "key ring" of regular heart arch-sectional tunnel on convex body section tunnel are obtained. In the meantime, airflow distribution status of regular heart arch-sectional tunnel at the period of fire is simulated, and the application range of "key ring" of regular heart arch-sectional tunnel at the period of fire is also obtained. And the application of "key ring" in monitoring of air volume of tunnel are discussed. The research results provide new theoretical support for measuring average wind speed and air volume accuratly and are of profound application significance.更多还原