摘要
作为新一代法规性质的稳态大气扩散模式,AERMOD将最新的大气边界层和大气扩散理论应用到空气污染扩散模式中。AERMOD具有下述特点:(1)按空气湍流结构和尺度的概念,湍流扩散由参数化方程给出,稳定度用连续参数表示;(2)中等浮力通量对流条件采用非正态的PDF模式;(3)考虑了对流条件下浮力烟羽和混合层顶的相互作用;(4)AERMOD模式系统可以处理:地面源和高架源、平坦和复杂地形和城市边界层;(5)AERMAP提出了一个有效高度对流场的影响。示踪试验表明,AERMOD模拟的结果比较理想。
In this paper, as an existing regulatory model, AERMOD is a steady-state plume model, introducing current planetary boundary layer (PBL) as well as air dispersion concepts into air pollutant dispersion models.A general overview of the most features of AERMOD is provided as:1)Based on air turbulence structure and scaling concepts, turbulence dispersion is described with parameterization equation, and stability is described with continuous parameters; 2)In the convective layer, the distribution is described with a bi-Gaussian probability density function; 3) Interaction plume with mixing layer top is accounted for; 4) The AERMOD model described here is applicable to rural and urban areas, flat and complex terrain, surface and elevated releases, at the same time, handling the urban boundary layer; 5) The AERMOD model is taking into account the affect of effective height on flow fields.Trace test shows that the AERMOD model yields useful results.
出处
《化学工业与工程》
CAS
2005年第2期130-135,共6页
Chemical Industry and Engineering
