贯通巷道风流流场数值模拟若干关键问题研究.pdfVIP

第 1 9 卷第 8 期 2 009 年 8 月 中回安全科学学报 China Safetv Science Joumal Vol. 19 No. 8 .2009 贯通巷道风流流场数值模拟若干关键问题研究* 高建良1 教授 玉春霞1 徐昆伦2 (1 河南理工大学安全科学与工程学院，焦作 454ω3 2 青岛远洋船员学院机电系，青岛 26ω71) 学科分类与代码 :6却.却，30 申图分樊号:X936 文献标识码:A 资助朋目:河南省高榄杰出人才创新工程项目(刷4KYCXOOS)d是江学者相创新团队发院计划资助(IRr0618) : 湖南现工大学学位论文创新慕盘(M -18) 。 {摘 要} 根据计算流体力学基本理论，利用计算流体动力学(CFD)软件凹uent，运用三维 k 叩 8 瑞 流模型对贯通型巷道风流流场数值模拟中风流入口、出口位置对巷道风流流场分布的影响、瑞动能 k 及瑞动能耗散率 s 的取值对模拟结果的影响等进行考察。通过研究确定模拟巷道的流体力学入 口长度，确定模拟巷道出口位置;瑞动能 k 及瑞动能耗散率 8 的取值对入口附近流动还没有充分发 展区域拟解算的结果影响较大，而对流动充分发展的区域影响较小。将数值模拟风速值与理论计算 风速值进行对比，模拟结果与计算结果非常一致，验证了数值模拟方法的正确性，为研究贯通型巷道 风流传质过程、瓦斯运移规律及通风排污效率等提供了理论基础。 l 关键词} 巷道 ; k 叩 8 模型; 入口长度; 瑞流参数; 数值模拟 Research of Several Key Problems in N umerical Simulation of Flow Field of Perforation Ai阳ay GAO Jian-liangl ,Prof. W ANG Chun-对a1 XU Kun-lun2 (1 School of Safety Science Engineering , Henan Polρechnic University , Jiaozuo 454ω3 ， China 2 Department of Mechanical Power Engineering , Qingdao Ocean Shipping Mariners Col1ege , Qingdao 26ω71 ， China) Abstract: Based on the foundational theory of CFD (Computational Fluíd Dynamícs) , the influence of velocity inlet and outlet on velocity field in airway with airflow through was studied with three-dimensional turbulence model by Fluent software. 响le affect of turbulence energy and dissipation rate on simulation re翩 sults of airflow field in roadway was investigated. On the basis of thís study , the entry region length and exit region length w制 determined. It shows that the influence of the selection of turhulence energy and dis嗣 sipation rate on simulation results of airflow field is great in nor卜fully-developed turhulent region , and small in fully developed turbulent region. The símulation results fit well Wíth the theoretical one. 咀le re- search provides a dependable basis for further studying the air mass transport process , the rules of methane accumulatíon and the efficiency of air displacement in airway wi出 airflow through. Key words: airway; k 叫 8 model; entηregion le