Diurnal Variation of the Dust Concentration in a Railway Tunnel
| Autor: | Hwa Hyeon Yoon, Jong Bum Kim, Se-Jin Yook, Gil-Hyun Tahk, Moon Se Hwang, Sang Hee Woo, Gwi-Nam Bae |
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| Rok vydání: | 2016 |
| Předmět: |
Engineering
010504 meteorology & atmospheric sciences Meteorology Strategy and Management education Geography Planning and Development Airflow Energy Engineering and Power Technology Transportation Video camera 010501 environmental sciences complex mixtures 01 natural sciences law.invention Ultrasonic anemometer law 0105 earth and related environmental sciences Civil and Structural Engineering business.industry Diurnal temperature variation Ranging respiratory tract diseases Gravitational sedimentation Automotive Engineering Train business Railway tunnel |
| Zdroj: | Journal of the Korean society for railway. 19:280-287 |
| ISSN: | 1738-6225 |
| DOI: | 10.7782/jksr.2016.19.3.280 |
| Popis: | In railway tunnels, dust is generated when trains run due to the contact between the wheels and the rails. The generated dust is suspended due to the train-induced airflow, with some of it deposited due to gravitational sedimentation. In this study, the diurnal variation of the dust concentration was investigated in a railway tunnel. A single lane of a tunnel was selected in which to observe more easily the dust concentration due to the passing of a train. Four particle-measuring instruments were utilized to detect dust ranging from 5nm to . To synchronize the train passing time at the measuring location, a three-dimensional ultrasonic anemometer and a video camera were used. It was found that the dust concentration was significantly increased from to due to the train. Particularly, the dust concentration was greatly increased to more than during the morning rush-hour times. |
| Databáze: | OpenAIRE |
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