Experimental and numerical research of fluctuation behavior in the gas wave oscillation tube under liquid-carrying condition

•Research on GWOT under gas–liquid two-phase conditions is inadequate.•The evaporation process of the phase transition model is modified.•The effects of liquid-carrying condition on the respective wave system are obtained.•The effect of liquid-carrying condition on the equipment declination is obtained. The fluctuation behavior in the gas wave oscillation tube (GWOT) under the liquid-carrying condition is changed by the effect of mist droplets, which leads to the change of the device optimal deflection angle, thus affecting the refrigeration temperature of the gas, but the lack of related research becomes the key to limit the expansion of the application of GWOT. In this study, an experimental platform with controllable liquid-carrying capacity is built, and the fluctuation behavior of the two-phase mist flow in the GWOT is investigated based on the modified multiphase flow model, and the influence law of the device deflection angle by the liquid-carrying condition is drawn out. The results of the study are presented as follows. The relative errors between the experimental average and simulation results of the pressure fluctuation curves range from 1.76 to 5.35%, such that the accuracy of the numerical model can be verified. The intensity of the respective wave system in the GWOT is decreased with the increase of the liquid-carrying capacity; under the liquid-carrying capacity of 40 wt%, the intensity of the shock wave is weakened by 13.5%, that of the expansion waves is reduced by 16.4%, and that of the reverse compression waves declines by 11.9%. The movement velocity of the shock wave is reduced with the increase of the liquid-carrying capacity, such that the device optimal deflection angle is increased, marking an increase by 15.6% under the liquid-carrying capacity of 40 wt%. The result of this study provides a favorable reference for subsequent research on the design of two-phase GWOTs and contributes to the application of GWOTs in liquid-carrying conditions.