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首页> 外文期刊>Transactions of the Japan society for aeronautical and space sciences >Dynamic Influence of Propellant Sloshing Estimation Using Hybrid: Mechanical Analogy and CFD
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Dynamic Influence of Propellant Sloshing Estimation Using Hybrid: Mechanical Analogy and CFD

机译:混合动力估算推进剂晃荡的动态影响:机械类比和CFD

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摘要

Liquid propellanl sloshing, which induces perturbations to dynamic behavior of spacecraft, is a serious problem. This paper proposes an approach based on equivalent mechanics theory and Computational Fluid Dynamics (CFD) technology to estimate the dynamic influence of propellant sloshing on spacecraft. A mechanical model was built by CFD technique and packed as a "sloshing"' block utilized in the spacecraft Guidance Navigation and Control (GNC) simulation loop. The block takes the motion characteristics of the spacecraft as inputs and outputs perturbative force and torques induced by propellant sloshing. It is more convenient to utilize in analysis of the coupling effect between propellant sloshing dynamics and spacecraft GNC than CFD packages directly. A validation case is taken to validate the accuracy and the superiority of the approach. The deducing process is applied to practical cases, and the simulation results are presented to demonstrate the proposed approach is efficient in identifying the problems induced by sloshing and evaluating effectiveness of several typical schemes for suppressing sloshing.
机译:液体螺旋桨晃动会引起对航天器动力行为的干扰,这是一个严重的问题。本文提出了一种基于等效力学理论和计算流体力学(CFD)技术的方法,以估算推进剂晃动对航天器的动态影响。通过CFD技术建立了一个机械模型,并包装成航天器制导导航和控制(GNC)模拟回路中使用的“晃动”块。该模块利用航天器的运动特性作为输入和输出由推进剂晃动引起的微扰力和扭矩。比起CFD封装,更方便地用于分析推进剂晃动动力学与航天器GNC之间的耦合效应。采取验证案例来验证该方法的准确性和优越性。推导过程应用于实际案例,并给出了仿真结果,以证明该方法可有效识别晃动引起的问题,并评估几种典型的晃动抑制方案的有效性。

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