摘要
本文为一次沿海岸边翻越二维山丘的扩散实验.结果表明:在一定条件下,假若两层空气的湍流强度和尺度的比值不大,当烟羽从上层侵入到下层较强混合气层时,不一定产生燻烟型扩散,仅表现为扩散参数在一定水平距离上的跃变.本文同时介绍了两组风洞实验的结果,其目的在于说明扩散参数跃变存在的事实.
The diffusion experiment over a low two-dimensional hill near the coast line has been shown under certain conditions, if the ratio of turbulence intensity to it's scale is not large enough between two neighboring layers, fumigation will not occur when the upward plume penetrates down into the lower layer where the strong mixing exists . It only displays a jumping of the curves of σz and σy at certain distance . The paper also introduces the results from two sets of wind tunnel experiments as comparison to demonstrate the above conclusion .
出处
《大气科学》
CSCD
北大核心
1993年第1期39-43,共5页
Chinese Journal of Atmospheric Sciences
关键词
气流
扩散
跃变型
扩散参数
实验
Fumigation diffusion model
Jumping diffusion model
Over hill flow
Diffusion parameter
Wind- tunnel simulation of diffusion experiment
Surface roughness Jumping .
