2.67 L板式表面张力贮箱设计及抗扰动性能仿真

    Design and Sloshing Suppression Simulation of 2.67 L Vane-type Surface Tension Tank

    • 板式表面张力贮箱因结构简单、性能良好被广泛应用于各类卫星平台. 本文针对微小卫星平台, 设计了一个2.67 L板式表面张力贮箱及其推进剂管理装置, 介绍了贮箱壳体、蓄液器、导流板和气泡筛网等主要部件的设计过程. 根据平板间的蓄流原理完成了贮箱蓄液器的设计, 得到不同加速度扰动情况下的蓄液体积; 基于内角自流理论对导流板进行几何设计并确定了内外导流板数量; 对气泡筛网进行了选型, 复核了典型工况下气泡筛网泡破点的有效性; 通过CFD仿真, 分析了贮箱在不同填充率、不同加速度扰动情况下的质心变化. 仿真结果表明, 当该贮箱受到10–3g量级加速度扰动时, 贮箱内推进剂质心变化小于10–2 m, 证明本文所设计的2.67 L板式表面张力贮箱具有较强的抗扰动特性.

       

      Abstract: Owing to its structural simplicity and superior performance, the vane-type surface tension tank has been widely applied in many satellites. In this paper, a 2.67 L vane-type propellant tank and its Propellant Management Device (PMD) were designed for micro satellites. The design process of key components, including the tank shell, propellant reservoir, vanes and bubble screen, was described in detail. Firstly, the design of the propellant reservoir was completed based on the principle of liquid accumulation between parallel plates, and the liquid volume under different acceleration disturbances was obtained. The outline and the number of internal and external vanes was carried out based on the theory of capillary flow in corners. Secondly, a bubble screen was selected and the effectiveness of the bubble screen in typical situation was checked. Finally, by CFD simulation, the centroid variation of the propellant in the tank under different fill levels and acceleration disturbances was analyzed. The simulation results demonstrate that when the tank is subjected to 10–3g acceleration disturbances, the centroid variation of the propellant is less than 10–2 m, proving that the 2.67 L vane-type surface tension tank exhibits strong resistance to disturbances.

       

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