Wine tunnel study on the dispersion characteristics with different discharge angles of airborne gas in various densities and arrangement structures

• Main Authors: Feng-Jen Tsai, 蔡豐任
• Other Authors: Bao-Shi Shiau
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/21445748558234974610

碩士 === 國立臺灣海洋大學 === 河海工程學系 === 97 === The wind tunnel experiments were conducted to measure the effects of different area densities of cubic structure groups on the dispersion characteristics of continuous discharge of tracer gas. Various area densities of structures arrangement (In-line arrangement of area density: 16%、44% , Staggered arrangement of area density: 16%、44%) and different source discharge angles (0°、45°、90°) cases were performed in the experiments. Measurement results show that: (1)The mean wind speed for the case of 16 % of in line arrangement is smaller than that for the case of 44 %. And the mean wind speed difference for the cases of 16 % and 43 % of staggered arrangement are not obvious. (2) The trace concentration becomes higher as the area density increases. The trace accumulation for the 43 % of staggered arrangement is the most significant among all cases. (3) As the source discharge angle is 0o, the effect of the area density on the tracer accumulation is not significant.