可視化情報学会誌
Online ISSN : 1884-037X
Print ISSN : 0916-4731
ISSN-L : 0916-4731
B101 水槽模型に画像計測を適用した成層換気試験
加賀 昭和谷 亜華井上 義雄安部 知之山口 克人
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1999 年 19 巻 Supplement2 号 p. 107-110

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Displacement Ventilation offers improved air quality and high ventilation effectiveness, and reduces air-conditioning costs relative to conventional Diffusion Ventilation. However, it is difficult for traditional techniques to measure flow velocity, temperature and tracer concentration to evaluate the characteristics of displacement ventilation since it is influenced by natural convection and has a complex flow field In this study, a series of experiments to measure flow velocity, temperature and tracer concentration distribution was performed for geometrically similar scale water tank model of room space equipped with displacement ventilation by applying image processing techniques. The distribution of local air exchange effectiveness was calculated from temporal change of tracer concentration distribution by the step-down method. It was confirmed that PTV for velocity measurement and tracer concentration measurement for local air exchange effectiveness calculation were useful to evaluate the characteristics of DV The dynamic range of liquid crystal thermometry should be expanded.

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