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A computational framework for predicting the combustion of energetic materials in an expanding chamber

机译：预测膨胀室内高能材料燃烧的计算框架

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Purpose - Various simplifications are introduced into the establishment of numerical models for problems with strong nonlinear interactions. The combustion of energetic materials in a chamber with moving boundaries is a typical example. This paper aims to establish a coupled numerical model for predicting the internal combustion in a launch process. Design/methodology/approach - A two-fluid model is used to predict the fluid field induced by the propellant combustion. The moving boundary is located by using a finite element method. Based on a user subroutine interface in the commercial software ABAQUS, the development of the fluid field and the mechanical interactions is coupled with each other. Findings - The paper is devoted to provide a coupled computational framework for predicting the propellant combustion in an expanding chamber. The coupling strategy is validated through predicting a pressure-driven piston system. Based on the validated computational framework, the two-phase reactive flows in a launch process is studied. The predicted parameters agree well with experimental measurements. Originality/value - This paper provide a method to address the difficulties in realizing the dynamic interactions between multi-phase reactive flows and mechanical behaviors. The computational framework can be used as a research tool for investigating fluid field in a combustion chamber with moving boundaries.
机译：目的-为具有强非线性相互作用的问题的数值模型的建立引入了各种简化。典型的例子是在边界移动的腔室中燃烧高能材料。本文旨在建立一个耦合数值模型，用于预测发射过程中的内燃。设计/方法/方法-使用双流体模型来预测由推进剂燃烧引起的流场。通过使用有限元方法定位移动边界。基于商业软件ABAQUS中的用户子例程界面，流场的发展和机械相互作用相互耦合。研究结果-本文致力于提供一个耦合的计算框架，用于预测膨胀室内推进剂的燃烧。通过预测压力驱动的活塞系统来验证耦合策略。基于验证的计算框架，研究了发射过程中的两相反应流。预测参数与实验测量值非常吻合。原创性/价值-本文提供了一种方法来解决实现多相无功流与力学行为之间的动态相互作用的难题。该计算框架可以用作研究工具，以研究具有移动边界的燃烧室中的流场。

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