Volume 3: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications 1989
DOI: 10.1115/89-gt-292
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The Influence of Dilution Hole Geometry on Jet Mixing

Abstract: Measurements have been made on a fully annular test facility, downstream of a row of heated dilution jets injected normally into a confined cross-flow at a momentum flux ratio of 4. The investigation concentrated on the consistency of mixing between the jets, as indicated by the regularity of the temperature pattern around the cross-flow annulus. When the heated air was supplied from a representative feed annulus, the exit velocity profile across each plunged hole was significantly altered and caused a distort… Show more

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Cited by 2 publications
(2 citation statements)
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“…This asymmetry is more evident in the contour maps of temperature rms ( Figure 2c) and vertical turbulent heat transport term (Figure 2e), resulting in a 'skew' symmetry of certain parameters about the line z -zc = y, as a referee validly suggested. The asymmetry has been attributed by the present authors [4] to the three-dimensional character of the jet trajectory at the exit of the nozzle, as suggested by Carotte and Stevens [6]. In the light of the results of this work, however, the asymmetry is also considered to be the fingerprint of the large-scale structure reported here (notice the similarity in shape between the contour map of the vertical turbulent heat transport term wT I in Figure 2e, and the map of the coherent part of this quantity in Figure 20.…”
Section: Basic Characteristics Of the Flow Fieldmentioning
confidence: 72%
“…This asymmetry is more evident in the contour maps of temperature rms ( Figure 2c) and vertical turbulent heat transport term (Figure 2e), resulting in a 'skew' symmetry of certain parameters about the line z -zc = y, as a referee validly suggested. The asymmetry has been attributed by the present authors [4] to the three-dimensional character of the jet trajectory at the exit of the nozzle, as suggested by Carotte and Stevens [6]. In the light of the results of this work, however, the asymmetry is also considered to be the fingerprint of the large-scale structure reported here (notice the similarity in shape between the contour map of the vertical turbulent heat transport term wT I in Figure 2e, and the map of the coherent part of this quantity in Figure 20.…”
Section: Basic Characteristics Of the Flow Fieldmentioning
confidence: 72%
“…The intense mixing between the cross flow and jet is a result of the development of a turbulent shear layer around the periphery of the je t and eddies formed in the jet wakes (C arrotte & Stevens, 1990). This rate of mixing is affected by (Lefebvre, 1999):…”
Section: 4 3 a Ir A D M Iss Io Nmentioning
confidence: 99%