科研之友
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摘要
The flow field and gaseous pollutant concentration field of double-lane street canyon were studied. Adopting two dimensional low-Re K-ε model and turbulence dispersion equation of passive scalar, three kind conditions of: pollution source possessing steady uniform release on upwind lane, pollution source possessing steady uniform release on downwind lane and pollution sources all had steady uniform release on both lanes were simulated respectively. The wind-tunnel test data were applied to test and verify the simulating, the results agreed very well. Under three kinds of different arrange release condition the flow field distribution was same; and at the same high level, the upwind pollutant concentration was always higher than the downwind pollutant concentration. Due to the variance of concentration gradient distribution induced by flow, be opposite to the state on upwind lane, the pollutant released from pollution source on downwind lane was easier to disperse outside the street canyon.
- 出版日期2007
- 单位中山大学
