Mixing structure of plane self-preserving buoyant turbulent plumes

Citation
R. Sangras et al., Mixing structure of plane self-preserving buoyant turbulent plumes, J HEAT TRAN, 120(4), 1998, pp. 1033-1041
Citations number
35
Categorie Soggetti
Mechanical Engineering
Journal title
JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME
ISSN journal
00221481 → ACNP
Volume
120
Issue
4
Year of publication
1998
Pages
1033 - 1041
Database
ISI
SICI code
0022-1481(199811)120:4<1033:MSOPSB>2.0.ZU;2-S
Abstract
Measurements of the structure of plane buoyant turbulent plumes are describ ed emphasizing conditions in the fully developed (self-preserving) portion of the flow. Plumes were simulated using helium/air sources in a still and unstratified air environment. Mean and fluctuating mixture fractions were m easured using laser-induced iodine fluorescence. Present measurements exten ded farther from the source (up to 155 source widths) and had more accurate specifications of plume buoyancy fluxes than past measurements and yielded narrower plume widths and different scaled mean and fluctuating mixture fr actions near the plane of symmetry than previously thought. Measurements of probability density functions, temporal power spectra, and temporal integr al scales of mixture fraction fluctuations are also reported.