INVESTIGATION OF ATMOSPHERIC DISPERSION IN INTERNAL BOUNDARY LAYER

内边界层大气扩散研究

• 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
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07458123/
• 关键词: INTERNAL BOUNDARY LAYER; ATMOSPHERIC DISPERSION; ATMOSPHERIC POLLUTION; TURBULENT WIND TUNNEL; PUFF-FUMIGATION MODEL; FLOW FIELD; TURBULENT FLOW; 乱流パラメータ; 乱流制御; パフ・フューミゲーションモデル; 拡散モデル; 3次元風速場モデル; 自然風の再現

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.

研究了内边界层大气扩散过程： 1．二维和三维湍流风洞的研制。(1)实验室建立了二维和三维湍流风洞。这些有多个粉丝。二维风洞垂直排列11个风扇，三维风洞水平排列6个二维风洞，总共66个风扇。这些风扇由计算机独立控制。为了增加流动中的垂直和水平湍流，在流动通道中设置了振荡翼型。在这些隧道的实验中，许多湍流参数的剖面，如平均风速、湍流强度、湍流尺度、功率谱等，都得到了令人满意的结果。这些实验结果已在第十四届风工程学术会议上公布。(2)自然风具有非常复杂的湍流特性，在风洞中得到了很好的模拟。2.利用风洞研究了内边界层大气扩散过程。(1)利用可视化技术观测了岸边区域的流动。(2)利用热线风速计测量了风洞内的流态。 (3)将上述测量结果与本课题组开发的喷烟熏蒸模型进行比较，得到了满意的结果。

项目成果

菊川裕規,高山稔,西亮,宮城弘守: "三次元乱流風洞の開発研究" 宮崎大学工学部研究報告. 41. 1-10 (1995)

Hiroki Kikukawa、Minoru Takayama、Ryo Nishi、Hiromori Miyagi：“三维湍流风洞的开发研究”宫崎大学工学部研究报告41. 1-10 (1995)。

大倉光志: "乱流風洞による自然風のシミュレーション" 日本流体力学誌「ながれ」 別冊. 14. 183-186 (1995)

Mitsushi Okura：“使用湍流风洞模拟自然风”日本流体动力学杂志“Nagare”特刊 14. 183-186 (1995)。

A.NISHI,H.MIYAGI,et al: "Control of turbulence in a multiplefan wind tunnel (in Japanese)" J.of Wind Engineering. 63. 101-102 (1995)

A.NISHI、H.MIYAGI 等人：“多风扇风洞中的湍流控制（日语）”J.of Wind Engineering。

高山 稔: "巨大構造物の強風特性に関する研究" 宮崎大学工学部紀要. 25(Accepted). (1996)

高山稔：“巨型结构的强风特性研究”宫崎大学工学部通报25（已录用）。

A.Nishi,H.Kikukawa Y.Matsuda,D.Tashiro: "Turbulence Control in Multiple-Fan Wind Tunnels" Proc.2nd Int.Symp.on Computational Wind Eng.121-128 (1997)

A.Nishi,H.Kikukawa Y.Matsuda,D.Tashiro：“多风扇风洞中的湍流控制”Proc.2nd Int.Symp.on Computational Wind Eng.121-128 (1997)