Experimental investigation of an axisymmetric, impinging turbulent jet. 2. Scalar field |
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Authors: | M. Fairweather G. Hargrave |
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Affiliation: | School of Process, Environmental and Materials Engineering, University of Leeds, Leeds LS2 9JT, UK, Department of Mechanical Engineering, Loughborough University, Loughborough LE11 3TU, UK,
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Abstract: | In this, the second part of a two-part study of an impinging air jet, measurements of mean and rms concentrations and concentration probability density functions obtained using a Mie scattering technique are reported. Results in the wall jet are in good agreement with earlier data obtained using laser Raman spectroscopy, although differences in the spreading rate of the wall jet do occur, most likely due to buoyancy. The data demonstrate the influence of the recirculation zone, identified in the first part of the study, on the mixing field in causing low levels of jet fluid to persist to large distances from the surface. This finding has important consequences for many mass transfer applications of impinging jets. |
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