INVESTIGATION OF ATMOSPHERIC DISPERSION IN INTERNAL BOUNDARY LAYER

内边界层大气扩散研究

基本信息

批准号：
07458123
负责人：
NISHI Akira
金额：
$ 0.58万
依托单位：
MIYAZAKI UNIV., FACULTY OF ENGINEERING
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1996
项目状态：
已结题

项目摘要

Atmospheric dispersion process in the internal boundary layr was investigated.1. Development of 2-and 3-dimensional turbulent wind tunnels.(1) Two-and three-dimensional turbulent wind tunnels were built in our laboratory. These have multiple-fans. Two-dimensional wind tunnel has 11 fans arranged vertically, and 3-dimensional one has 6 raws of 2-dimensional one horizontally, so that it has 66 fans as the total. These fans are controlled by computers independently. To add the vertical and horizontal turbulence in the flow, oscilating airfiols are set in the flow channels. In the experiments of these tunnels, the profiles of many turbulent parameters, such as mean wind speeds, turbulence intensities, turbulence scales, power spectra, etc., were produced satisfactorily. The results of these experiments were presented at the 14th wind engineering symposium.(2) Natural wind has very complicated characteristics of turbulence, and these are simulated in the wind tunnels satisfactorily.2.The atmospheric dispersion process in the internal boundary layr was examined by using the wind tunnels.(1) The flow around the shore area was observed by the visualization technique.(2) Flow pattern was measured by the hot-wire anemometers in the internal boundary layr which was produced on the shore area model set in the 3-dimensional wind tunnel.(3) Above measurement results were compared with the puff-fumigation model which had been developed by our group, and a satisfactory agreement was obtained.

研究了内边界内的大气分散过程。1。（1）在我们的实验室中建造了2和三维的湍流隧道。（1）两维湍流隧道。这些有多种粉丝。二维风隧道垂直安排了11个粉丝，而3维的风洞水平有6个二维的RAW，因此总共有66位粉丝。这些风扇由计算机独立控制。为了在流动中添加垂直和水平的湍流，在流动通道中设置了振荡的气体。在这些隧道的实验中，令人满意地产生了许多湍流参数的曲线，例如平均风速，湍流强度，湍流尺度，功率谱等。这些实验的结果在第14届风力工程研讨会上呈现。（2）自然风具有非常复杂的湍流特征，这些特征在风隧道中进行了令人满意的方式。2。内部边界内部边界内部边界分散过程在内部边界内的大气分散过程通过使用风隧道周围的风格进行了测量。内部边界线是在三维风隧道中设置的岸边区域模型上产生的。（3）将测量结果上述测量结果与我们组开发的吹气烟雾模型进行了比较，并获得了令人满意的一致性。