Author(s): Jialing Liang; Nian Ye; Yuanhao Xiao; Yiyi Ma

Linked Author(s):

Keywords: Ir-water flow; Bubble; Emptying process; Water-filled tank

Abstract: The emptying processes of a water-filled tank with a bottom orifice under different orifice sizes and ventilation conditions were studied experimentally. The water pressure fluctuations at the tank bottom and the air pressure in the headspace were recorded simultaneously during the emptying process, and the corresponding air-water flow features in the tank were captured with a high-speed camera. Based on the experimental observations, three emptying modes were identified, including periodic draining mode with periodic bubble generation in the tank, full bore draining mode without bubble formation, and coupled mechanism draining mode with consecutive bubble generation after a period of draining time. The mechanism for bubble generation at the bottom orifice was analyzed theoretically and validated against the experimental data. The experiment-based analytical development provided a better understanding of the air-water flow features during tank emptying processes under different ventilation conditions.

DOI: https://doi.org/10.3850/978-90-833476-1-5_iahr40wc-p1678-cd

Year: 2023