微重力板式贮箱推进剂重定位的数值仿真

板式表面张力贮箱内推进剂重定位对确定推进剂分布情况、研究晃动影响、提高控制精度等具有重要意义．为研究板式贮箱内推进剂重定位的规律，对微重力下板式贮箱内液体重定位问题进行数值仿真．计算时使用三维非定常两相流动流体（VOF）模型，对某一板式贮箱寿命末期在不同微重力加速度情况下各种重定位过程进行数值仿真，得到各种工况下重定位的全过程，以及定位后推进剂的分布情况．数值仿真结果为板式贮箱的设计提供有利依据．

Numerical Simulation for Reorientation of Propellant in a Vane Tank under Microgravity

Reorientation of propellant in a vane surface tension tank is of great significance for the ascertainment of propellant distribution, and research on liquid shaking mechanism, and improvement of control accuracy and so on. In order to investigate a law of propellant reorientation, propellant reorientation processes in vane type tank under different microgravity conditions are numerically simulated. The paper introduces a twophase flow model of three-dimensional unsteady VOF （volume of fluid） , and based on the model numerically simulates all kinds of reorientation processes in a vane type tank during near depletion phase under different microgravity acceleration conditions, then all processes of propellant reorientation under different working conditions and propellant distributions after reorientation are obtained. The simulation results provide advantageous foundation for design of the vane tank.