飞机抛物线飞行试验中的液体行为仿真

微重力环境下液体的流动特性和晃动行为是航天工程上颇为关心的问题,也是进行推进剂管理的基础。飞机抛物线飞行是创建微重力环境地面实验方法之一,可实现对一定时间内液体行为的观测,但其成本较高且试验时长受限。基于失重飞机的一般运动规律,对单次及多次抛物线飞行的任务剖面进行了设计,并以单次抛物线飞行为例、利用CFD软件对液体行为进行了数值仿真,分析了失重飞行段初始条件对微重力液体响应的影响。仿真结果可为失重飞机飞行任务剖面的设计和优化提供参考。

Simulation of liquid behavior in aircraft parabolic flight test

The flow characteristics and sloshing behavior of liquid under microgravity are of major concern to aerospace engineering,and are the basis for propellant management.Aircraft parabolic flight is one of the ground experimental methods for creating a microgravity environment,through which the liquid behavior during a certain period of time can be observed,but its cost is high and the experimental time is limited.Based on the general motion laws of weightless aircraft,the flight mission profiles of single and multiple parabolic flights were designed and CFD software was utilized to simulate the liquid behavior.Moreover,the influences of initial conditions of weightless flight period on liquid responses in microgravity were analyzed.The simulation results presented in this paper can provide reference for the design and optimization of the flight mission profiles of weightless aircraft.