title: Flow characteristics of an inclined air-curtain range hood in a draft.
abstract: The inclined air-curtain technology was applied to build an inclined air-curtain range hood. A draft generator was applied to affect the inclined air-curtain range hood in three directions: lateral (θ=0°), oblique (θ=45°), and front (θ=90°). The three suction flow rates provided by the inclined air-curtain range hood were 10.1, 10.9, and 12.6 m(3)/min. The laser-assisted flow visualization technique and the tracer-gas test method were used to investigate the performance of the range hood under the influence of a draft. The results show that the inclined air-curtain range hood has a strong ability to resist the negative effect of a front draft until the draft velocity is greater than 0.5 m/s. The oblique draft affected the containment ability of the inclined air-curtain range hood when the draft velocity was larger than 0.3 m/s. When the lateral draft effect was applied, the capture efficiency of the inclined air-curtain range hood decreased quickly in the draft velocity from 0.2 m/s to 0.3 m/s. However, the capture efficiencies of the inclined air-curtain range hood under the influence of the front draft were higher than those under the influence of the oblique draft from 0.3 m/s to 0.5 m/s.
authors: Institute of Occupational Medicine and Industrial Hygiene, National Taiwan University, Taiwan.
authors: Jia-Kun
authors: JK
authors: Chen
mesh_terms: D000392:Air Movements; D016902:Air Pollution, Indoor / Q000517:prevention & control*; D003296:Cooking; D004867:Equipment Design; D005740:Gases; D006794:Household Articles; D014691:Ventilation / Q000295:instrumentation*
chemical_list: D005740:Gases