推进剂管路接头内腔残液在轨吹除过程研究

为研究推进剂在轨加注后残留在管路接头内腔的情况,使用气液两相非稳态模型计算了吹除过程中管路接头内腔气液两相流场变化情况.吹除初始时刻直管路内流场压力出现小幅震荡,管路接头内腔中存在漩涡状流场将残液卷吸入直管路中,是残液得以吹出的主要机理.结果表明管路接头内腔中的绝大部分液体可以被吹除出去,残液吹除效果良好.

On the Process of Orbital Residual Propellant Blowing-off in the Intra-Cavity of Pipeline Connector

In order to study the case that propellant remains in the intra-cavity of pipeline connector after orbital refueling, the two-phase unsteady model of volume of fluid （VOF） is used to simulate the gas-liq- uid flow field during the blowing-off process. The pressure distribution has little range of vibration in the straight pipeline at the initial blowing-off process. There is an eddy-style flow field and the eddy brings the residual propellant from the intra-cavity of pipeline connector into the straight pipeline, which is the main mechanism of the residue blowing-off process. The results show that most of the residual propellant in the intra-eavity of pipeline connector can be blew out, and prove the fine effect of the blowing-off process.