Library Subscription: Guest

ISSN Online: 2377-424X

ISBN Print: 0-89116-299-2

International Heat Transfer Conference 7
September, 6-10, 1982, Munich, Germany

TWO PHASE DENSITIES AND PRESSURE DROPS IN THE LOW FLOWRATE REGION FOR DIFFERENT DUCT INCLINATIONS

Get access (open in a dialog) DOI: 10.1615/IHTC7.4520
pages 271-276

Abstract

Density and pressure drop data were obtained for a water-nitrogen mixture in adiabatic conditions at room temperature, at the pressure of 2.16 MPa, and at low.flow rates,within a wide gas weight fraction ran ge, in a 77.9 mm duct,for three different flow inclinations: vertical upflow, horizon tal flow, vertical downflow. Pressure drops in vertical upflow show a trend opposite to that normally found: they decrease with gas weight fraction and flowrate. Pressure drops in horizontal flow have a more regular trend, even if quantitatively unconventional. Pres sure drops in downflow decrease with flow-rate, at lower gas weight fractions. Mixture densities are not too different in vertical upflow and horizontal flow, whereas, except for higher flowrates, they are substantially different in downflow. Pressure drops in vertical upflow are well predicted by CISE-DIF-3 correlation.