Elevated Point Source Dispersion around Consecutive Two Ridged Hills in the Turbulent Boundary Layer Flow of Coastal City

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Project title

Code/計畫編號

MOST104-2221-E019-037

Translated Name/計畫中文名

海岸城鎮紊流邊界層內高程點源污染在相連兩脊狀山丘之擴散特性實驗

Project Coordinator/計畫主持人

Bao-Shi Shiau

Funding Organization/主管機關

National Science and Technology Council

Department/Unit

Department of Harbor and River Engineering

Website

https://www.grb.gov.tw/search/planDetail?id=11576056

Year

2015

Start date/計畫起

01-08-2015

Expected Completion/計畫迄

01-07-2016

Bugetid/研究經費

755千元

本研究以實驗研究在海岸城鎮(市郊地況)下之中性大氣紊流邊界層內點源污染排放於相連兩脊狀山丘地形之擴散特性，實驗係利用山丘不同斜坡角度、排放源與第一個地形之距離、以及不同之排放源高度等參數，進行探討各參數對於污染排放擴散特性(包括濃度分佈、擴散尺度)之影響效應。 This study was to investigate the dispersion characteristics of air pollution plume around consecutive two ridged hills in the atmospheric boundary layer of coastal city (suburban terrain). The experiments were conducted in the Environmental Wind Tunnel of National Taiwan Ocean University which had a test section with cross section of 2m by 1.4m and 12.6m long. Spires and roughness elements were deployed to simulate the adiabatic atmospheric turbulent boundary layer of coastal city. Methane was used as the tracer for dispersion of air pollution plume. Effects of the angle of triangle hill, source height, and distance between source and the hill on the dispersion characteristics of pollution plume are investigated in the present study.

Keyword(s)

高程點源
雷諾數
羽昇流
密度福祿數
捲增速度
延散尺度參數
紊流邊界層
脊狀山丘
elevated point source
Reynolds number
plume
densimetric Froude number
entrainment speed
dispersion parameter
turbulent boundary layer
ridged hill

DSpace CRIS

Elevated Point Source Dispersion around Consecutive Two Ridged Hills in the Turbulent Boundary Layer Flow of Coastal City

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