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Laser-induced fluorescence measurements of mixed fluid concentration in a liquid plane shear layer

Koochesfahani, M. M. and Dimotakis, P. E. (1985) Laser-induced fluorescence measurements of mixed fluid concentration in a liquid plane shear layer. AIAA Journal, 23 (11). pp. 1700-1707. ISSN 0001-1452. doi:10.2514/3.9154.

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The processes of entrainment and mixing are investigated in a nonreacting, uniform density, liquid mixing layer. Laser-induced fluorescence diagnostics and high-speed, real-time digital image acquisitions techniques are combined to measure the probability density function of the composition field. Results show that the vortical structures in the mixing layer initially roll up with a large excess of high-speed fluid in the cores. It is found that the mixed fluid composition, above the mixing transition, is essentially uniform across the entire transverse extent of the layer and is asymmetric with a bias in favor of the high-speed fluid. Preliminary observations indicate that the composition of the mixed fluid is more uniform across a liquid shear layer than that in the gaseous layer. The important effect of the resolution capability of the measurement apparatus on the results are discussed and comparisons with recent theoretical calculations are presented.

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Additional Information:© 1985 American Institute of Aeronautics and Astronautics. Presented as Paper 84-0198 at the AIAA 22nd Aerospace Sciences meeting, Reno, NV, Jan. 9-12, 1984; received Aug. 27, 1984; revision submitted Jan. 20, 1985.
Issue or Number:11
Record Number:CaltechAUTHORS:20160602-172456643
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Official Citation:M. KOOCHESFAHANI and P. E. DIMOTAKIS. "Laser-induced fluorescence measurements of mixed fluid concentrationin a liquid plane shear layer", AIAA Journal, Vol. 23, No. 11 (1985), pp. 1700-1707.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:67608
Deposited By: Paul Dimotakis
Deposited On:10 Jun 2016 19:03
Last Modified:11 Nov 2021 03:51

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