Abstract
Critical Heat Flux (CHF) is one of the most important factors in the designing of the water tube in boiling two-phase flow equipments, such as a conventional boiler, a nuclear power plant and so on. However, the CHF has quite different mechanism on each flow patterns, i.e. bubbly flow, slug flow and annular flow. In this investigation, in order to understand the influence of the flow pattern on CHF, the axial stepwise heating tube along the axial direction is used, which is so called hot patch test. As the experimental results, the obtained CHF was drastically changed with inlet flow pattern, and was evaluated by using a regime-based modeling.
