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Minimum air entrainment velocity of vertical plunging liquid jets

✍ Scribed by A.K. Biń

Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
992 KB
Volume
43
Category
Article
ISSN
0009-2509

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✦ Synopsis

Air entrainment by vertical liquid plunging jets is considered. Mechanisms leading to the onset of entrainment are briefly discussed. New experimental data are collected for the two regions of the onset of entrainment: droplet and continuous jet regions. For the droplet region of entrainment an empirical correlation is obtained. It is shown that there is some correspondence between the break-up length of jets and the limiting value of Lj for entrainment in this region. For the continuous jet region turbulence intensity is one of the main factors which influence the values of V,. Some analogies with plunging solid tapes and rotating rollers are also pointed out.

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✍ E. Van de Sande; John M. Smith 📂 Article 📅 1973 🏛 Elsevier Science 🌐 English ⚖ 559 KB

theory is given of the aeration produced by the impact of a high speed water jet on a water surface. Experimental verification agrees more than satisfactorily with the developed theory over a wide range. The boundary conditions for the theory have a physical meaning. The jet must be submitted to air