ESDU 01014:2012
$89.05
Frictional Pressure Gradient in Adiabatic Flows of Gas-Liquid Mixtures in Horizontal Pipes: Prediction Using Empirical Correlations and Database
| Published By | Publication Date | Number of Pages |
| ESDU | 2012-11 | 75 |
ESDU 01014 is one of a group of Data Items on the prediction of
pressure drop in two-phase gas-liquid mixtures in piping systems.
It provides the engineer with techniques for the assessment of the
frictional pressure gradient in gas-liquid mixture flows in
horizontal pipes and allows estimates to be made of the accuracy of
the predictions.
By means of a statistical analysis, method selection charts are
developed that show, for ranges of both the mass quality of the gas
component and the mixture mass flux, the order of ranking in
accuracy of selected empirical correlations. As a result the
best-performing correlation is recommended for any practical set of
conditions. Using performance charts the pressure gradient
predictions can be made and the likely errors involved for each
correlation within those conditions can be assessed.
Specific empirical correlations may be more suitable for a given
flow pattern. Thus, where flow pattern data are available,
comparisons between the empirical correlations and the pressure
drop data are also classified by means of a statistical analysis in
terms of flow pattern and mass quality of the gas component. These
results are included in further selection and performance
charts.
Underpinning the work is a database of gas-liquid frictional
pressure drop measurements in horizontal flows. This database
contains nearly 6500 carefully selected and evaluated data points
and is comparable in size (for the specific case of horizontal
flows) with previous databases. In the validation process, many
more thousands of data points were rejected as being
unreliable.
The use of the methods is illustrated by worked examples.
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