HOANG NHAN HIEN(1), LE THI THU(1), NGUYEN VAN THAI(2), D.T.EUH(3)
1Institute of Nuclear Science and Technology, 179 Hoang Quoc Viet, Cau Giay, Hanoi
2University of Science & Technology, 113 Gwahangno, Yusong-gu, Daejeon, South Korea
3Korea Atomic Energy Research Institute, 150 Dukjin, Yusong-gu, Daejeon, South Korea
Abstract: Predicting flow pattern using flow parameters such as void fraction, superficial velocities and interfacial area concentration (IAC), etc, is required to solve conservation equations and field equation for two-phase flow problems. In this paper, relations among the two-phase flow patterns and these flow parameters in a vertical pipe are given by the experimental data obtained with the Vertical Air-Water Loop (VAWL). The flow parameters included pressures, superficial velocities, void fractions and IAC are measured by pressure transmitters, impedance void meters (IVM) and five-sensor conductivity probes at three locations along the pipe. The experiment results show changes of pressure, void fraction and superficial velocity along the pipe under bubbly/slug flow conditions. The design and working principle of the facility and measuring equipments are also presented in this paper.
Keyword: VAWL, Two-phase Flow, Void fraction, IAC