Open AccessWind tunnel experiments on smoke diffusion from a chimney
Author(s) -
X Inthavideth,
S Nobumasa,
S Phommachanh
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1109/1/012055
Subject(s) - turbulence , chimney (locomotive) , turbulent diffusion , mechanics , diffusion , meteorology , smoke , wind tunnel , diffuser (optics) , eddy , environmental science , jet (fluid) , wake , physics , atmospheric sciences , thermodynamics , optics , light source
The diffusion of heated and unheated jets from a chimney was investigated in cross flows with large-scale turbulence generated by a Makita-type active turbulence generator and with gird generated turbulence. The behavior of jet with smoke was observed by a high-speed camera. The smoke was dispersed more widely by meandering motion in the large-scale turbulence. The turbulent eddies corresponding to the integral scale should effectively contribute to the meandering smoke diffusion. The time-averaged smoke concentration distribution was obtained from the brightness values of instantaneous images. The stream-wise variations of the smoke diffusion width and the smoke flow center were evaluated from the distribution. Obtained data were compared with previous correlations.