ISSN Online: 2377-424X
International Heat Transfer Conference 4
VAPOR VOID FRACTION IN ANNULAR CHANNELS AT SEPARATED AMD JOINT HEAT SUPPLIED
摘要
Results of void fraction measurements in subcooled water boiling within an annular channel are discussed. Heat was supplied to the inner, outer and both walls of the channel; the operating conditions were: P = 9.8 ÷ 98 bar, q = 0,29 ÷ 2,3 Mw/m2, Wo = 0,5 ÷ 4,0 m/sec. Influence of the heat supply method was revealed. An approximate two-dimensional approach to predict void fraction in turbulent nonequilibrium flow is supposed. The approach gives satisfactory explanation to trends of experimental data.