Calculation of the spray flooding rate
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When calculating the hydraulics of plate towers, there is a parameter called the liquid spray flooding percentage%. How is this value calculated? Please provide the formula, thank you
“Where did the term “spray flooding rate %” come from?
Reply to 2# wiseboy: The terms in the hydraulics calculation manual from East China University of Science and Technology
This post was last edited by wiseboy on 2011-9-28 at 16:38. Stop creating new terms to describe old problems; universities should pay more attention to using standard terminology. “\"Spray flooding rate %\" is the traditional \"tray flooding rate\". Consistency in academic terminology helps avoid ambiguity and reduce complications. This is not figure skating, which pursues art.
Jet flooding is what foreigners call it; in essence, it is what we refer to as foam-entrained flooding.
There are two types of flooding rates: one is the liquid spraying flooding rate on the tray plates, also known as the mist entrainment flooding rate； The English name is JET FLooding ； The other is the downcomer flooding ratio; the former represents the ratio of the liquid phase volume on a tray to the space between trays, with it being generally required that the flooding caused by the sprayed liquid not exceed 80% ； The latter represents the value of the liquid phase height in the downcomer divided by the spatial height of the downcomer; the reference value is also 80%. When the spray flooding ratio exceeds 100%, liquid phase backmixing occurs, resulting in a decrease in the efficiency of the tray ； When the flooding ratio of the downcomer exceeds 100%, the downcomer becomes flooded, the liquid layer on the tray thickens, and the pressure drop increases.
How does bubble entrainment cause flooding?