Critical heat fluxes on a flat plate pasted on one end of a series connected rectangular duct containing pressurized HE II

摘要

CHFs were measured on single same sized flat plate heaters located at one-ends of three two-series-connected rectangular ducts with different cross-sectional areas in subcocled He II for bulk liquid temperature range of 1.8 to 2.1 K at atmospheric pressure. One side of the flat plate heater made of Manganin was attached to the end plate made of Fiber-Reinforced Plastics (FRP), and the other end of the duct was opened to pressurized He II. The ratio of the cross-sectional area of second duct to that of first duct was varied from 1.64 to 3.15. As the ratio increased, the values of the CHFs increased and approached a constant value. A CHF correlation that can express the experimental data within 15 % error was presented.