燃油跨多隔舱流动及晃动特性分析

为获得输油过程中燃油流通能力及弹射起飞激励下的晃动特征，通过采用有限点集法对多隔舱油箱进行了数值模拟。研究结果表明：有限点集法可以清晰捕获燃油流动和晃动的自由液面特征。油箱载油量影响晃动的程度，油量减少则液面变化剧烈，重心发生大范围移动。隔舱框板的开孔面积是影响流通能力的重要因素，当其在±10%范围内变化时，流动阻力及能量耗散差异显著，这在一定程度上揭示了框板开孔与晃动抑制之间的内在机理，为多隔舱框板的工程设计和流体晃动阻尼理论研究提供重要参考。

Characteristics of fuel flowing and sloshing in crossing multi-compartments tank

To obtain the negotiability of fuel in the transfer process and the sloshing characteristics under ejection takeoff excitation, a numerical simulation of a multi-compartments tank is carried out using the finite pointset method. The results show that this method can capture more accurate characteristics of the free surface. It is found that the degree of fuel sloshing is different under different fuel load. When there is less fuel in the tank, the free surface changes drastically and fiercely, leading to a wide range of movement for the center of gravity. The opening area of the compartment frame is an important factor affecting the negotiability. When it varies within ±10%, the flow resistance and energy dissipation of fuel change obviously. The internal relationship between the frame opening area and sloshing suppression are revealed to a certain degree. This study can provide important reference for multi-compartments frame design and theoretical study of fluid sloshing damping.