Visualization of Gas-Liquid Interfacial Structure in a Narrow Channel Using Electrical Conductance

概要

論文の詳細を見る
Three-dimensional reconstruction of two-phase interfacial structure in a narrow channel was conducted by using the liquid film thickness and void fraction distributions measured by liquid film sensors. This sensor based on the electrical conductance measurement between the electrodes. A pair of liquid film sensors is installed on the opposing walls of the rectangular flow channel, and the electrical conductance between the electrodes on a sensor and between the sensors was measured. Then, the liquid film thickness on the walls and the void fraction in the narrow gap are obtained in two-dimensional area. The liquid film sensor with a spatial resolution of 2×2 mm2 was applied to measure the air-water two-phase flow in the narrow rectangular channel with a gap of 1.5mm and a width of 32mm. The measured distributions of the liquid film thickness and the void fraction were used to estimate the thickness of the gaseous phase, and the gas-liquid interfacial structure was visualized in bubbly, slug and churn flows.