Flow and Contaminant Leakage ofExterior Suction Hoods

• Main Authors: Kuan-chung Tai, 戴冠中
• Other Authors: Rong-fung Huang
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/33751283760273169051

碩士 === 國立臺灣科技大學 === 機械工程系 === 97 === Experimental studies on the performance of the conventional exterior hood have been conducted. Flow patterns and contaminant leakage on hood was examined by laser light assisted smoked-flow visualization method. The local and global contaminant leakages were quantified by measuring the concentration of SF6 tracer gas. It has been found that in the conventional exterior hood that the contaminant in front of the table was very vulnerable to external disturbances. From the gathered experimental results, the best operating condition was obtained and recommended for minimal contaminant leakage. It has been discovered that the conventional exterior hood can not isolate the contaminant because the suction flow rate is totally independent of the leakage.