空间液氪气液分离装置流阻特性及数值模拟

Analysis and Numerical Simulation of Liquid Krypton Flow Resistance in Membrane Channel Gas-liquid Acquisition Device

为满足低温推进剂在空间微重力环境中的气液分离要求,针对液氪低温推进剂在轨管理与传输问题,建立筛网式气液分离装置单通道流动压力损失的理论预测模型,获取120 K饱和状态液氪在325×2300荷兰斜纹编织网中流动的泡破点压力。对比分析了不同低温流体、通道宽度、质量流量对过网压降的影响规律,获得了液氪在通道中流动的压降分布,并通过国外液氢过网压降实验数据对模型进行了验证。通过建立液氪单通道流动数值仿真模型,较好地预测了过网压力损失。

In order to meet the requirements of gas-liquid separation of cryogenic propellant in space environment,for the problem of cryogenic liquid-krypton propellant acquisition and transmission in orbit,a theoretical prediction model is established to obtain the bubble-point pressure of liquid-krypton in saturated state of 120 K flowing in 325×2300 Dutch twill woven mesh.The influence laws of different cryogenic fluids,channel widths,and mass flow rates on the over-the-network pressure drop are comparatively analyzed.The pressure drop distributions of liquid-krypton flowing in the channel are obtained.The pressure drop distribution of liquid-krypton flow in the channel is obtained,and the model is verified by the pressure drop test data of liquid hydrogen over the network.The numerical simulation model of liquid krypton single-channel flow is established,which can better predict the pressure loss across the network.