高原复杂地形下城市重气泄漏的数值模拟  

Numerical Simulation of Dense Gas Leakage in Plateau City at Complex Terrain

作　　者：张朝能[1,2] 宁平[1] 马彩霞[1,3] 

机构地区：[1]昆明理工大学环境科学与工程学院,昆明650093 [2]昆明市环境科学研究院,昆明650032 [3]云南省环保产业科技开发中心,昆明650032

出　　处：《武汉理工大学学报》2009年第20期62-64,77,共4页Journal of Wuhan University of Technology

基　　金：教育部春晖计划项目(2003009)

摘　　要：针对高原山区地形条件下城市重气泄漏流动和扩散的特点,提出了合适的数学物理模型。给出了计算所需的定解条件,诸如计算区域的确定、初始及边界条件的选取,采用Realizableκ-ε双方程湍流模型和SIMPLE算法,模拟出高原山区城市重气泄漏流动和扩散的过程,流场模拟结果与风洞实测结果误差仅2.2%。重气浓度场模拟结果与实测结果吻合良好,下风向近距离范围内重气浓度分布出现偏态分布。The mathematical physics models could be put forward to reflect the physical phenomenon in the air turbulent flow and dispersion with dense gases, where topography change or obstacles exists. The condition to determine the solution such as the determination of calculation area, the selection of initial and boundary condition was given. The Realizable k-ε two-equation turbulence model was used in the simulation. They were solved by means of a method based on the SIMPLE algorithm. From this validation it can be concluded that the error is only 2.2 % between the simulation and measurement of flow field. The dense gas concentration of simulation and measurement exactly coincides, and the variation of concentration with the transverse distance is skew distribution in the near distance.

关 键 词：高原山区 重气 泄漏 数值模拟 计算流体力学 

分 类 号：X932[环境科学与工程—安全科学]