沸騰二相流場における等速吸引法を用いた液滴流量測定

抄録

Entrainment under high heat flux is one of a key important factor for predicting a liquid film dryout in annular flow, because liquid droplets would be produced due to not only interfacial shear stress but also breakup of bubble in liquid film. In this experiment, the liquid droplet flow rate in boiling two-phase flow was measured by using an isokinetic sampling method. On the basis of entrainment fraction just below CHF condition, the applicability of this method was confirmed. As the results, under high quality condition, the liquid droplet flow rate shows the good agreement with a film flow model, while the liquid droplet cannot be measured due to disturbance wave under low quality with high mass flux condition. These data implied to exist of the entrainment due to boiling, and more detail investigation is needed.