燃油跨多隔舱流动及晃动特性分析

doi:10.7527/S1000-6893.2021.25818

Abstract

Abstract: 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.

Key words: aircraft fuel system, negotiability, sloshing, multi-compartments tank, finite pointset method

CLC Number:

V228.1

LI Zhenghong, WANG Yameng, LIU Jing, TONG Xiaolong, ZHAO Ying. Characteristics of fuel flowing and sloshing in crossing multi-compartments tank[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2021, 42(8): 525818-525818.

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

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