高蒸发率下筛网通道式液体获取装置的金属筛网毛细性能研究

Study on capillary performance of metal screen mesh of screen channel liquid acquisition device at high evaporation rate

筛网通道式液体获取装置是低温推进剂在轨管理的关键技术之一,其中具有高蒸发速率的低温推进剂在金属筛网的毛细性能是影响筛网通道式液体获取装置工作性能的主要因素。以筛网通道式液体获取装置的常用金属筛网——荷兰斜纹编织网为研究对象,以乙醇和丙酮为工质,采用红外热像仪实验研究了在高蒸发率下易挥发工质在荷兰斜纹编织网经丝方向的毛细性能,通过分析经纬丝密度与工质种类对毛细性能的影响并结合毛细爬升理论模型,系统评价了荷兰斜纹编织网经丝方向的毛细性能,分析比较不同易挥发工质毛细性能参数,并与文献结果相对比,证实了所得到参数的准确性,为筛网通道式液体获取装置的设计提供了技术基础。

The screen channel liquid acquisition device is one of the key technologies of cryogenic propellants management, and the capillary performance of the cryogenic propellants with high evaporation rate on the metal screen is the main factor affecting the working performance of the screen channel liquid acquisition device. In this paper, the capillary performance in the direction of warp wires of the Dutch Twill Weave(DTW) commonly used in the screen channel liquid acquisition device was investigated through infrared camera by using ethanol and acetone as the working fluids under larger evaporation rate. The influences of the densities of warp and shute wires and the types of working fluids on the capillary performance were analyzed, and the capillary performance in the direction of warp wires of the DTWs was systematically evaluated theoretically with the model of capillary rise. By comparing and analyzing the capillary performance obtained by different volatile working fluids, and further comparing with the results from the literature, the accuracy of the obtained parameters was confirmed, which could provide a technical basis for the design of the screen channel liquid acquisition devices.