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Seventh International Symposium on Turbulence and Shear Flow Phenomena
July, 28-31, 2011, Ottawa Convention Centre, Ottawa, Canada

DOI: 10.1615/TSFP7

EXPERIMENTAL QUANTIFICATION OF DROPLET COLLISION RATES IN TURBULENT SPRAYS

pages 1-6
DOI: 10.1615/TSFP7.720
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摘要

In this publication, droplet collision rates in turbulent sprays are quantified experimentally. It is documented in the scientific literature that the presently employed theoretical models underestimate the influence of turbulence on the collision rates. The discrepancy between theory and measurements will be quantified here by a direct comparison between measured and predicted collision rates considering different turbulent properties and droplet size distributions.
The present paper describes in detail the corresponding procedure, starting with a description of the experimental facility, and then introducing how to measure the collision rates in turbulent sprays. Two different measurement configurations are considered and corresponding parameters are listed. The results obtained from the measurements are then presented, together with a comparison using appropriate theoretical approaches for each configuration. Finally, conclusions are drawn and the importance of measurement data to clarify this issue is discussed.

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