Dynamic instabilities of boiling two-phase flow in a single horizontal channel

Abstract

Dynamic instabilities of two-phase flow associated with refrigerant R-11 in a uniformly heated horizontal in-tube boiling system were experimentally investigated. An experimental setup was designed and built to work in a wide range of mass fluxes G [75–1050 kg/(m2 s)], heat fluxes q (0–100 kW/m2), and fluid inlet temperatures Tinlet (2–24°C). Dynamic instability data were obtained under various working conditions. The dependence of oscillation amplitude and period on system parameters is discussed, and the boundaries of various oscillations are located on the steady-state characteristic curves.