Flow Characteristics and Spillage Mechanisms of an Inclined Quad-Vortex Range Hood Subject to Influence from Draft.
The flow and spillage characteristics of an inclined quad-vortex (IQV) range hood subject to the influence of drafts from various directions were studied. The laser-assisted smoke flow visualization technique was used to reveal the flow characteristics, and the tracer-gas (sulfur hexafluoride) conce...
| Publicado en: | Journal of Occupational & Environmental Hygiene Vol. 12; no. 4; pp. 235 - 245 |
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| Autores principales: | , , |
| Formato: | equations & formulas pictorial research tables/charts Journal Article |
| Publicado: |
Taylor & Francis Ltd
Apr2015
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=103775019&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 103775019 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 15459624 V1L jtl: Journal of Occupational & Environmental Hygiene issn: 15459624 maglogo: Y pubinfo: dt: Apr2015 vid: 12 iid: 4 pid: 377 pub: Taylor & Francis Ltd place: Philadelphia, Pennsylvania artinfo: ui: 103775019 101590896 10.1080/15459624.2014.987383 NLM25436893 103775019 ppf: 235 ppct: 10 formats: fmt: @attributes: type: P tig: atl: Flow Characteristics and Spillage Mechanisms of an Inclined Quad-Vortex Range Hood Subject to Influence from Draft. aug: au: Huang, Rong Fung Chen, Jia-Kun Lin, Jyun-Hua affil: Department of Mechanical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan, Republic of China sug: subj: Air Pollution, Indoor Taiwan Equipment Design Cooking Human Experimental Studies Lasers Taiwan Education, Continuing (Credit) ab: The flow and spillage characteristics of an inclined quad-vortex (IQV) range hood subject to the influence of drafts from various directions were studied. The laser-assisted smoke flow visualization technique was used to reveal the flow characteristics, and the tracer-gas (sulfur hexafluoride) concentration detection method was used to indicate the quantitative values of the capture efficiency of the hood. It was found that the leakage mechanisms of the IQV range hood are closely related to the flow characteristics. A critical draft velocity of about 0.5 m/s and a critical face velocity of about 0.25 m/s for the IQV range hood were found. When the IQV range hood was influenced by a draft with a velocity larger than the critical draft velocity, the spillage of pollutants became significant and the pollutant spillage rate increased with increasing draft velocity. At draft velocities less than or equal to the critical value, no containment leakages induced by the turbulence diffusion, reverse flow, or boundary-layer separation were observed, and the capture efficiency was about 100%. The IQV range hood exhibited a high ability to resist the influences of lateral and frontal drafts. The capture efficiency of the IQV range hood operated at the suction flow rate 5 to 9 m3/min is higher than that of the conventional range hood operated at 11 to 15 m3/min. pubtype: Academic Journal doctype: equations & formulas pictorial research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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