ガイゼリング現象解明のための室内実験における沸騰部容積の影響に関する研究

抄録

When the liquid in the vertical pipe is heated, depending on the conditions, the liquid inside will be boiled rapidly, and the geysering phenomenon which repeats ejection and re-inflow of liquid occurs. The geysering phenomenon is classified as a kind of unstable flow phenomenon that occurs in the pipeline, and may occur in the pipeline of a power plant that uses boiling phenomena such as boilers, and it is can be a problem. In this study, we investigated the influence of the heating amount of the heater, the water level at the start of the experiment, the temperature of the cooling water, and the volume of the boiling part on the geysering phenomenon. The experimental device consists of a boiling vessel, a vertical tube and a sub plenum. The experiment is started by heating the working fluid with a heater installed at the bottom of the boiling vessel. The experimental conditions are the input power, the water level at the start of the experiment, and the temperature of the sub plenum. In addition, we created mathematical models and compared the results of numerical analysis and experiments. As a result, liquid temperature and water level fluctuation showed similar tendency.