Abstract
For the application to the developing Nuclear Power Plant (NPP) safety analysis code SPACE, Korea Atomic Energy Research Institute (KAERI) proposed a new mechanistic droplet entrainment rate model which is applicable to the horizontal stratified flow condition. In the present study, an experimental work was conducted in the droplet entrainment conditions under the horizontal stratified flow condition. For this, visualization experiments for the interfacial wave were performed in the air-water horizontal rectangular channel of which width, height and length are 40 mm, 50 mm, and 4.2 m, respectively. In the test, a slope, a hypotenuse length and a surface area of an interfacial wave were measured in the droplet entrainment conditions. From this work, we improved original wave height model proposed by Taitel and Dukler [1] by using experimental data. Finally we could formulate three coefficients models in the KAERI droplet entrainment model.
