Heat Transfer Research

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Calculation of Vapor Content of a Two-Phase Flow in Water Boiling on Horizontal Tubes (Single Tubes and Tube Bundles)

V. D. Chaika
Far Eastern Technical Institute of Fish Industry, Vladivostok, Russia

ABSTRACT

Calculation of vapor content of a two-phase flow is made for water boiling on single horizontal copper tubes 10, 16, 24, 34, and 70 mm in diameter and also on a five-row-bundle of copper tubes 34 mm in diameter at a pressure of 26 < p < 200 kPa and specific heat flux of q — onset of nucleation and up to 200 kW/m². The characteristics of the process of boiling simultaneously in two directions are obtained by high-speed filming; the formulas are obtained. Empirical nondimensional correlations are based on various experimental results. The formulas take into account the effect of side tubes and a tube pitch.