Flow and Leakage Characteristics of Conventional Kitchen Hoods
碩士 === 國立臺灣科技大學 === 機械工程系 === 101 === The flow and leakage characteristics of a conventional commercial box-type kitchen hood were experimentally studied. The conventional commercial box-type kitchen hood included three design configurations (with plate, with slotted plate, and without plate). The c...
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| Format: | Others |
| Language: | en_US |
| Published: |
2013
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| Online Access: | http://ndltd.ncl.edu.tw/handle/01324465947588485734 |
| Summary: | 碩士 === 國立臺灣科技大學 === 機械工程系 === 101 === The flow and leakage characteristics of a conventional commercial box-type kitchen hood were experimentally studied. The conventional commercial box-type kitchen hood included three design configurations (with plate, with slotted plate, and without plate). The characteristic flow patterns in the horizontal and vertical planes of the conventional commercial box-type kitchen hood were captured by flow visualization method. The leakage characteristics of conventional commercial box-type kitchen hood were recorded by SF6 tracer-gas concentration detection technique. A recirculation bubble was formed at the upper left side of the hood due to the boundary layer separation. This recirculation bubble caused the smoke disperse out of the hood when the face velocity of the hood was high. The high leakage concentration was detected around the area of inverted U in the hood face. Placing a mannequin in front of the hood face would induce large turbulent flows, and cause a significant leakage concentration into the environment through the left edge of the hood. The moving object passed through the hood face doesn’t have significant effect for the leakage concentration at high face velocities. Overall, the conventional commercial box-type kitchen hood showed low performance that improvement in aerodynamic design is required.
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