Experimental analysis of particle concentration heterogeneity in a ventilated scale chamber |
| |
| Authors: | Hanhui Jin Qingping Li Lihua Chen Jianren Fan Lin Lu |
| |
| Institution: | 1. School of Aeronautics and Astronautics, Zhejiang University, Hangzhou 310027, PR China;2. State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, PR China;3. Department of Building Services Engineering, Hong Kong Polytechnic University, Hong Kong, China;1. Istituto Superiore di Sanità, Toxicological Chemistry Unit, Viale Regina Elena 299, I-00161 Rome, Italy;2. Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle d’Aosta, Via Bologna 148, I-10154 Turin, Italy;3. Istituto Zooprofilattico Sperimentale dell’Umbria e delle Marche, Via Cupa di Posatora 3, I-60100 Ancona, Italy;4. Istituto Zooprofilattico Sperimentale della Sardegna, Via Vienna 2, I-79100 Sassari, Italy;5. Istituto Zooprofilattico Sperimentale del Lazio e della Toscana, Via Appia Nuova 1411, I-00178 Rome, Italy;6. Istituto Zooprofilattico Sperimentale della Puglia e Basilicata, Via Manfredonia 20, I-71121 Foggia, Italy;7. Istituto Zooprofilattico Sperimentale del Piemonte, Liguria e Valle D’Aosta, Piazza Borgo Pila 39, I-16129 Genoa, Italy;1. International Laboratory for Air Quality and Health, Queensland University of Technology, Brisbane, QLD 4001, Australia;2. Institute of Environmental Science and Engineering, National University of Civil Engineering, Hanoi, Vietnam;3. School of Population Health, The University of Queensland, Herston, QLD 4006, Australia |
| |
| Abstract: | The mixing processes of the aerosol particles from an outdoor environment in a ventilated scale chamber were experimentally studied. The particles were classified into five groups by size: 0.3–0.5 μm, 0.5–1.0 μm, 1.0–3.0 μm, 3.0–5.0 μm and 5.0–10.0 μm. The developing process for the concentration of each particle group was measured in different kinds of flow fields.The results show that the flow field configuration can effectively influence the dispersion time rate of the particles at certain positions. The increase in particle diameter can decrease the dispersion time rate. When the gas flow velocity is high, the particle dispersion time rate is independent of particle size; but when the gas flow velocity is low, particle size can significantly affect the particle dispersion time rate because the turbulent diffusion becomes important in the air and particle transport. The uniformity of the particle concentration for certain positions in steady state tends to be controlled by the inflow velocity, flow field configuration and the particle diameters. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
