Original scientific paper
VERIFICATION OF THE JCAP ROADSIDE AIR QUALITY SIMULATION MODEL
Hiroaki Minoura
; Petroleum Energy Center, Toranomon, Minato-ku, Tokyo, Japan, Toyota Central R&D Labs., Inc., Nagakute, Aichi, Japan
Akiyoshi Ito
; Petroleum Energy Center, Toranomon, Minato-ku, Tokyo, Japan, Japan Automobile Research Institute, Ibaraki, Japan
Abstract
By the reinforcement of the vehicle emission reduction requirement, NOX concentration in a roadside atmosphere reduced
clearly recently. However, the ambient NO2 concentration does not show a variation. For the purpose of provision of data
contributing to environmental policy making through development of high accuracy Air Quality Model and impact prediction of
improved air quality, the Japan Clean Air Program had started.
A commercial CFD model of Star-CD was used as the roadside air quality model. The chemical reactions of NO oxidation with
ozone, photodissociation of NO2, and ozone formation are going to introduce in this model. Involving a spatial distribution of ozone
concentration measurement, temporal and spatial variation of NO and NO2 was measured by the devices of chemiluminescence
method which were prepared by each chemical species. Concentration-change was measured at the same time in four sites every one second to pay attention to a percentage of NO2/NOX which varied from route neighborhood to lee side way. The air flow of each
sites were monitored by the ultrasonic 3D anemometer. The effect of NO2 concentration change due to the air stagnation or background ozone concentration was evaluated.
Keywords
nitric oxide; nitrogen dioxide; ozone; roadside air quality; vehicle emission
Hrčak ID:
64297
URI
Publication date:
12.12.2008.
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