Wind tunnel simulation of air pollution dispersion in a street canyon.
Physical simulation was used to study pollution dispersion in a street canyon. The street canyon model was designed to study the effect of measuring flow and concentration fields. A method of C02-laser photoacoustic spectrometry was applied for detection of trace concentration of gas pollution. The advantage of this method is its high sensitivity and broad dynamic range, permitting monitoring of concentrations from trace to saturation values. Application of this method enabled us to propose a simple model based on line permeation pollutant source, developed on the principle of concentration standards, to ensure high precision and homogeneity of the concentration flow. Spatial measurement of the concentration distribution inside the street canyon was performed on the model with reference velocity of 1.5 m/s.
Civis
Svatopluk
S
J Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, Prague. civis@jh-inst.cas.cz
Strizík
Michal
M
Janour
Zbynek
Z
Holpuch
Jan
J
Zelinger
Zdenek
Z
D000392:Air Movements; D000397:Air Pollution / Q000032:analysis*; D000465:Algorithms; D002138:Calibration; D007834:Lasers; D000432:Methanol / Q000032:analysis; D008962:Models, Theoretical; D013053:Spectrophotometry
D000432:Methanol