A theoretical model of gas column breakup under a swirling flow field based on the jet theory

Maintaining the stability of the gas column/liquid film in a swirling flow field in thorium molten salt reactor (TMSR) and pressurized water reactor (PWR). The linear stability analysis in jet theory can be used for this problem. This method focuses on the maximum growth rate of the perturbation at the gas-liquid interface and determines the stability of the gas column based on it. This approach is usually applied in the cases under nonswirling flow field. In this paper, we extend this method to the study of stability problem under a swirling flow field. We classify the stability problem within different reactors into two categories. The detailed calculation method of the maximum growth rate is given separately for the two cases. Based on the calculated maximum growth rate, we experimentally verified the stability method. Considering the differences between non-swirling flow field and swirling flow field, we improve the original method and give a new prediction correlation. The prediction errors of new correlation are within +/- 20 %.