层结大气中烟气扩散的实验和数值模拟  

Experimental and Numerical Modeling of Plume Dispersion in Stratified Atmospheres

作　　者：张伯寅[1,2] 李长令 桑建国[1,2] 

机构地区：[1]北京大学湍流研究国家重点实验室 [2]北京大学地球物理系

出　　处：《大气科学》1999年第1期19-24,共6页Chinese Journal of Atmospheric Sciences

基　　金：国家自然科学基金;北京大学校长基金

摘　　要：利用不同密度分层的盐水模拟稳定大气层结条件，对复杂地形上的烟气绕流及其扩散规律进行实验研究，是一个被实践证明行之有效的方法。同时对低层逆温中出现的烟气扩散现象也得到了独特的效果。且水中实验具有可视化的优点，可以得到直观的显示图像。通过烟气扩散灰度的变化，也可对其浓度量化，使定性研究又取得了进展。特别是对复杂地形所做的数值模拟计算与实验的相互验证。Laboratory observation of plume dispersion and diffusion over complex topography in towing tank experiments with salt water as stratifying agent has proved to be a useful modeling means in the investigation of plume dispersion characteristics over complex terrain in stratified atmospheres Various phenomena of plume dispersion under conditions of elevated inversion were also usefully modeled Flow visualization technique made it possible to directly and clearly observe the flow field and the dye darkness can be quantified by means of image processing enabling the plume concentration field to be detected Numerical modeling of the same problem was also carried out and satisfactory agreement between the computed and the observed results were obtained

关 键 词：层结大气 湍流扩散 模拟实验 烟气扩散 

分 类 号：P425.2[天文地球—大气科学及气象学] X16[环境科学与工程—环境科学]