基于内角流动的板式表面张力贮箱内推进剂流动过程研究

A study of propellant flow in the vane-type surface tension tank based on interior corner flow

分析了在微重力环境下,板式表面张力贮箱内推进剂的流动和定位过程。利用VOF方法对贮箱内推进剂的重定位过程进行了仿真计算,验证了贮箱及PMD的推进剂管理性能。用数学方法分析了液体在导流板的内角流动,用解析计算的方法求出流动过程中液面的长度,并和仿真计算结果进行了对比。因为实际的贮箱模型比较复杂,仿真计算结果和理论计算结果存在一定的误差,但其流动趋势保持一致。本文的工作能够为内角流动的研究提供有益的参考。

The flow and distribution of propellant in the vane-type surface tension tank in microgravity condition was studied. The rewetting process of propellant in tank was calculated by numerical simulation using VOF method, and the liquid management capability of the tank and PMD was tested. The interior corner flow of propellant along the PMD was investigated by analytical solutions, and the length of the meniscus in the tank was calculated, and the results were compared with the numerical simulation results. Inevitably, errors were noticed between numerical simulation and analytical solution due to the complication of the model of spherical tank with PMD, but they were in accordance with the tendency of the flow. The present research can provide useful reference for the study of interior corner flow.