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A Study for Characteristics of Stack Plume Dispersion under Various  

Park, Il-Seouk (School of Mechanical Engineering, Kyungpook National University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.22, no.11, 2010 , pp. 773-780 More about this Journal
Abstract
The dispersion of plume which is emitted from a chimney is governed by a lot of factors： wind, local terrain, turbulence intensity of atmosphere, and temperature, etc. In this study, we numerically investigate the plume dispersions for various altitudinal temperature gradients and wind speeds. The normal atmosphere has the temperature decrease of $0.6^{\circ}C/100m$, however, actually the real atmosphere has the various altitudinal temperature profiles according to the meteorological factors. A previous study focused on this atmospheric temperature gradient which induces a large scale vertical flow motion in the atmosphere thus makes a peculiar plume dispersion characteristics. In this paper, the effects of the atmospheric temperature gradient as well as the wind speed are investigated concurrently. The results for the developing processes in the atmosphere and the affluent's concentrations at the ambient and ground level are compared under the various altitudinal temperature gradients and wind speeds.
Keywords
Plume dispersion; Wind speed; Ground level concentration; Atmospheric temperature gradient;
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