管廊内燃气泄漏扩散的模型试验与数值仿真-工程力学-清华大学.pdf

23 9 Vol.23 No.9 2006 9 Sep. 2006 ENGINEERING MECHANICS 189 1000-4750(2006)09-0189-04 * 1 2 3 2 (1. 518060 2. 518031 3. 518035) k − ε k − ε O242; O35; TU99 A EXPERIMENT AND NUMERICAL SIMULATION OF GAS DIFFUSION IN UTILITY TUNNELS * 1 2 3 2 FANG Zi-hu , LIN Hong , HUANG Gu , ZHENG Han-zhong (1. College of Architecture Civil Engineering, Shenzhen University, Shenzhen, Guangdong 518060, China; 2. Shenzhen Works Bureau, Shenzhen, Guangdong 518031, China; 3. Shenzhen Municipal Engineering Design Institute, Shenzhen, Guangdong 518035, China) Abstract: Experiments on gas leaking rates in utility tunnels were carried out. Based on the experiments, gas mole distribution in utility tunnels was simulated using numerical method. The experiments were simulated with several classical turbulent models. Compared with experimental results, it is found that the gas mole fraction can be simulated by standard k − ε turbulent model, the results of which satisfy the demands of practical applications. Key words: fluid dynamics; turbulence; numerical simulation; k − ε model; experiment; inflammable gas; diffusion; utility tunnel 2.40m 2.85m 21 [1] 2666m 2004-12-04 2005-01-13