THERMAL SCIENCE

International Scientific Journal

Arun Autee

,

S. Srinivasa Rao

,

Ravikumar Puli

,

Ramakant Shrivastava

AN EXPERIMENTAL STUDY ON TWO-PHASE PRESSURE DROP IN SMALL DIAMETER HORIZONTAL, DOWNWARD INCLINED AND VERTICAL TUBES

ABSTRACT
An experimental study of two-phase pressure drop in small diameter tubes orientated horizontally, vertically and at two other downward inclinations of θ= 300 and θ = 600 is described in this paper. Acrylic transparent tubes of internal diameters 4.0, 6.0, and 8.0 mm with lengths of 400 mm were used as the test section. Air-water mixture was used as the working fluid. Two-phase pressure drop was measured and compared with the existing correlations. These correlations are commonly used for calculation of pressure drop in macro and mini-microchannels. It is observed that the existing correlations are inadequate in predicting the two-phase pressure drop in small diameter tubes. Based on the experimental data, a new correlation has been proposed for predicting the two-phase pressure drop. This correlation is developed by modification of Chisholm parameter C by incorporating different parameters. It was found that the proposed correlation predicted two-phase pressure drop at satisfactory level.
KEYWORDS
two-phase pressure drop, small diameter, inclined tubes
PAPER SUBMITTED: 2013-01-18
PAPER REVISED: 2013-05-25
PAPER ACCEPTED: 2013-06-05
PUBLISHED ONLINE: 2013-06-16
DOI REFERENCE: https://doi.org/10.2298/TSCI130118081A
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2015, VOLUME 19, ISSUE Issue 5, PAGES [1791 - 1804]
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An experimental study on two-phase pressure drop in small diameter horizontal, downward inclined and vertical tubes

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