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Improved combustion model of boron particles for ducted rocket combustion chambers

机译：管式火箭燃烧室硼粒子燃烧模型的改进

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摘要

A combustion model of boron particles for detailed Computational Fluid Dynamics (CFD) based simulations of ducted rocket combustion chambers is studied. It is aimed to construct a model for combustion of boron containing gas mixtures ejected from a solid propellant gas generator. This model includes all main physical processes required to define an accurate particle combustion simulation. The reaction rate modeling in similar, previous studies are improved for ramjet combustion chambers and this model provides better predictions for all particle sizes. The reactions in the ignition stage are reformulated as competing reactions for consumption of (BO)(n) polymers. Large discrepancies between the experimental and calculated ignition times for the 3 mu m diameter particles in similar studies are eliminated. The developed model is added to a commercial CFD solver and can be used along with gas phase detailed turbulent combustion simulations of ducted rocket combustion chambers. Our simulation approach has provided us an effective tool, which allows us to forecast the effects of the changes on the performance and efficiency. This detailed combustion model is validated with existing experimental results available in open literature. The model is also compared with the results of similar previous studies. (C) 2017 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
机译：研究了用于基于管式火箭燃烧室的详细计算流体动力学（CFD）模拟的硼颗粒燃烧模型。目的在于构建用于从固体推进剂气体发生器喷射的含硼气体混合物燃烧的模型。该模型包括定义精确粒子燃烧模拟所需的所有主要物理过程。在类似的先前研究中，对冲压喷气发动机燃烧室的反应速率模型进行了改进，并且该模型为所有粒径提供了更好的预测。重新将点火阶段的反应重新定义为消耗（BO）（n）聚合物的竞争反应。消除了类似研究中直径为3微米的颗粒的实验时间与计算的点火时间之间的巨大差异。所开发的模型已添加到商用CFD求解器中，可与管式火箭燃烧室的气相详细湍流燃烧模拟一起使用。我们的仿真方法为我们提供了有效的工具，使我们能够预测变化对性能和效率的影响。该详细的燃烧模型已通过公开文献中提供的现有实验结果进行了验证。该模型也与以前类似研究的结果进行了比较。 （C）2017燃烧研究所。由Elsevier Inc.出版。保留所有权利。

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