航天器贮箱出流过程液体晃动及防晃  

Liquid sloshing and anti-sloshing of spacecraft tank during outflow

作　　者：杨唱 孙冰[1] 方杰[1] YANG Chang;SUN Bing;FANG Jie(School of Astronautics, Beijing University of Aeronautics and Astronautics,Beijing 100191,China)

机构地区：[1]北京航空航天大学宇航学院,北京100191

出　　处：《航空动力学报》2018年第12期3065-3072,共8页Journal of Aerospace Power

摘　　要：针对某航天器贮箱,利用VOF(流体体积)方法对贮箱出流过程中液体晃动及防晃效果进行研究,模拟一定简谐加速度激励下,贮箱出流对液体晃动的影响,并对贮箱增设水平环形防晃板,研究了出流过程中不同宽度、不同分布的防晃板的防晃效果。通过与实验结果对比,验证了VOF方法在计算液体晃动的可靠性。随着出流过程中贮箱充液率减小,液体重心波动幅度明显增加,晃动更为剧烈。当对贮箱增设防晃板时,防晃板能显著抑制出流过程中液体的重心波动。通过对比四种不同宽度的防晃板,得出当防晃板宽度与贮箱直径之比为0.1时,其防晃效果较优且受力最小;对比三种不同分布的防晃板,发现设置五层均布在圆柱段的防晃板时防晃效果最好。The sloshing and anti-sloshing of the liquid in the spacecraft tank during outflow was simulated numerically,using VOF(volume of fluid)method under a harmonic acceleration excitation.The influence of outflow on liquid sloshing was analyzed.The liquid sloshing of the tank with different widths and arrangement of anti-sloshing baffles was simulated,and also adopted to study the effect of anti-sloshing.The accuracy of VOF method was verified by comparison of simulated and experimental results.The fluctuation of the gravity center of liquid increased obviously with the decrease of the residual liquid volume during outflow.During the sloshing,the fluctuation can be reduced significantly with the setting of the anti-sloshing baffles.The comparisons of baffles with four different width show that the effect of anti-sloshing is good,and the pressure imposed on the baffle is least when the baffle width is 1/10 of the tank diameter.The anti-sloshing effect of the five layers baffles is better than four layers or six layers baffles.

关 键 词：晃动 贮箱 出流 简谐激励 防晃板 

分 类 号：V434[航空宇航科学与技术—航空宇航推进理论与工程]