Experimental Investigation of Air-Water Two-Phase Upflow across Horizontal Tube Bundles : Part II, Pressure Drop

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The present paper deals with experimental results and the theoretical approach to a pressure drop in an air-water two-phase upflow across horizontal tube bundles. The tube bundles are staggered in equilateral arrangement of three different pitch/tube diameter ratios (1.4, 1.28, and 1.08) and they consist of six different tube rows (7, 9, 11, 13, 15, and 20) for each ratio. The experimental data indicate that pressure drop depends on superficial air velocity and pitch/tube diameter ratio, but not on superficial water velocity. The experimental results are compared with predicted values of pressure drop. Vast majority of predictions are shown to lie within ±3% of the experimental values.
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