Numerical research on sloshing of free oil liquid surface based on different baffle shapes in rectangular fuel tank

Abstract

Oil liquid sloshing is a normal physical phenomenon in fuel tank under variable conditions of vehicles. Installing baffles in fuel tank is an effective method to suppress oil liquid sloshing. The influence of different baffle shapes on the pressure of oil liquid sloshing and time-area value is the focus of this work. Four factors influencing the baffle shape and baffles of six different shapes are provided in this research. The pressure history curves of oil liquid sloshing at the central point and on the central line, the history curves of velocity of oil liquid mass and volume, oil liquid pressure contours, and the position diagrams of free oil liquid surface were obtained and compared in fuel tanks with baffles of different shapes. Compared with the sloshing pressure of oil liquid and time-area values in fuel tanks with baffles of different shapes, the sloshing pressure of oil liquid at the central point is the smallest in fuel tank with baffles of corrugated shape, and the sloshing pressure of oil liquid on the central line is the smallest in fuel tank with baffles of straight-line shape. However, the baffles of corrugated shape are most beneficial to reduce time-area values.

Influencing analysis of different baffle factors on oil liquid sloshing in automobile fuel tank

“…Oil liquid sloshing often causes sloshing noise, interruption of fuel supply under the high-speed variation of automobile acceleration, structural damage of fuel tank and its internal parts, increase of evaporation emission, and so on. 7–9…”

“…Oil liquid sloshing often causes sloshing noise, interruption of fuel supply under the high-speed variation of automobile acceleration, structural damage of fuel tank and its internal parts, increase of evaporation emission, and so on. [7][8][9] Liquid sloshing is generally studied by theory, simulation, and experiment. The theoretical research focuses on the equivalent model of small amplitude liquid sloshing and nonlinear characteristics of liquid sloshing.…”