Abstract
Additional experimental data of the disturbance waves in boiling two-phase flow were obtained over a wider range of quality than our previous study [1]. In order to clarify the differences in the characteristics of the disturbance waves between the boiling steam-water system and the adiabatic air-water system, two effects were experimentally investigated. One was the effect of hydrodynamic non-equilibrium due to boiling, namely the modification of the liquid distribution among the base film, disturbance waves and entrainment. The other was that of the gas-liquid density ratio. In the experiments with the evaporating tube followed by the unheated section, the former effect was observed in the standard deviation of the wave propagation velocity, the mean wave time-separation and the wave shape. Finally by comparing the data of the steam-water system with those of the air -water system for three density ratios, it was concluded that the disturbance waves between both systems were different in nature.
