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首页> 外文期刊>Transactions of the Japan society for aeronautical and space sciences >Combined Analysis of Thruster Plume Behavior in Rarefied Region by Preconditioned Navier-Stokes and DSMC Methods
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Combined Analysis of Thruster Plume Behavior in Rarefied Region by Preconditioned Navier-Stokes and DSMC Methods

机译：预处理的Navier-Stokes和DSMC方法对贫乏地区推进器羽状流行为的联合分析

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摘要

Satellite attitude is usually controlled by plume exhaust from thrusters into the vacuum of space. To study the plume effects in the highly rarefied region, the Direct Simulation Monte Carlo (DSMC) method is usually used, because the plume flow field contains the entire range of flow regime from the near-continuum near the nozzle exit through the transitional state to free molecular state at the far field region from the nozzle. The purpose of this study is to investigate the behavior of a small monopropellant thruster plume in the vacuum region numerically by using the DSMC method. To obtain more accurate results, the preconditioned Navier-Stokes algorithm is introduced to calculate continuum flow fields inside the thruster to predict nozzle exit properties, which are used for inlet conditions of DSMC method. As a result, the plume characteristics in the highly rarefied flow, such as strong nonequilibrium near nozzle exit, large back flow region, etc., are investigated.
机译：卫星的姿态通常由推进器的烟羽排放到太空真空中来控制。为了研究高度稀疏区域中的羽流效应，通常使用直接模拟蒙特卡罗（DSMC）方法，因为羽流流场包含从喷嘴出口附近的近连续区域到过渡状态到过渡状态的整个流态范围。在远离喷嘴的远场区域的自由分子态。这项研究的目的是使用DSMC方法在真空区域中数值研究小型单推进器推进器羽流的行为。为了获得更准确的结果，引入了预处理的Navier-Stokes算法来计算推进器内部的连续流场，以预测喷嘴出口特性，该特性用于DSMC方法的入口条件。结果，研究了高度稀疏流中的羽流特性，例如喷嘴出口附近的强烈非平衡，较大的回流区域等。

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