【摘要】 论文用大涡模拟技术对对流边界层中高架烟流的扩散进行了模拟 .在对流边界层中对高斯扩散模式的使用进行了修正 .由Willis等 ( 1 978)的对流槽扩散实验数据求出虚拟源高 ,代替高斯烟流扩散公式中的源高 ,由此求得的横风向积分浓度分布与实验结果和数值模拟结果吻合较好 .并用KNRC试验№ 52的资料作了验证 ,结果表明 :修正后的高斯扩散模式的模拟效能良好更多还原

【Abstract】 The dispersion of elevated plume in the convective boundary layer(CBL) is calculated with the aid of a large eddy model and the modification of Gaussian dispersion model in the CBL is conducted. The source height of Gaussian dispersion model is replaced with the virtual source height calculated from the convective tank dispersion experiment of Willis et al.(1978). It is found that the distribution of cross wind integrated concentration(CWIC) from this method agrees well with the experimental and numerical simulation results. It is then tested with №52 data from KNRC field observation, and the result indicates that the modified Gaussian dispersion model is very good in use.更多还原