WIND TUNNEL MEASUREMENTS OF CONCENTRATION FLUCTUATIONS IN AN URBAN STREET CANYON

A wind tunnel study was performed to examine some turbulent characteristics and statistical properties of the concentration field developing from the steady release of a tracer gas at street level in a canyon in an urban area. The experiment was conducted with the approaching wind direction perpendicular to the street axis and, with a street width to building height aspect ratio equal to 1. Concentration time series were recorded at 70 points within the test street cross-section and above. Mean concentrations, variances, and related turbulent quantities, as well as other statistical quantities including quantiles, were computed. Concentration spectra and autocorrelation functions were also examined. The aim of this paper is to advance potential benefits of the experimental approach taken in this study. Through a simple and already widely studied configuration, it is aimed to show how, for modeling purposes, this approach can help improve understanding of the mechanisms of pollution dispersion from car exhausts in urban areas and, with further measurements, assist in drawing specifications for siting monitoring networks.

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  • Corporate Authors:

    Elsevier

    The Boulevard, Langford Lane
    Kidlington, Oxford  United Kingdom  OX5 1GB
  • Authors:
    • Pavageau, M
    • SCHATZMANN, M
  • Publication Date: 1999-10

Language

  • English

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Filing Info

  • Accession Number: 00798718
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 13 2000 12:00AM