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首页> 外文期刊>Journal of propulsion and power >Computational Fluid Dynamics Simulation of Hybrid Rockets of Different Scales
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Computational Fluid Dynamics Simulation of Hybrid Rockets of Different Scales

机译：不同尺度混合火箭的计算流体动力学模拟

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摘要

CFX software is used to simulate different hybrid rocket configurations, applying liquid N_2O as the oxidizer and paraffin as the fuel. This work is the prosecution of a previous paper analyzing liquid injection in a lab-scale hybrid rocket. It is focused on the formulation of the most suitable simulation technique to represent another type of liquid injector, compared with the one described in the previous paper. It also aims at extending the computational fluid dynamics simulation approach to hybrid rockets of larger scales. To validate computational fluid dynamics output, experimental results coming from both a laboratory scale and an increased-scale engine have been used. The different geometries studied include an increased-scale engine with a cylindrical grain having no diaphragm, the same rocket with a one-hole diaphragm inside the fuel grain, and a lab-scale rocket with a one-hole diaphragm. Simulations are steady state, and combustion derives from a single-phase chemical reaction. Liquid injection is fully simulated for the oxidizer, but paraffin entrainment is neglected for the fuel. Computational fluid dynamics results show a good agreement with the corresponding experiments for the ballistic parameters of interest in this study: chamber pressure, efficiency, and C~*. Computational fluid dynamics results prove that the simulation technique proposed can be applied to any hybrid rocket scale.
机译：CFX软件用于模拟不同的混合火箭配置，以液态N_2O作为氧化剂，以石蜡为燃料。这项工作是对先前分析实验室规模混合火箭液体注入的论文的起诉。与前一篇论文中介绍的液体喷射器相比，本文着重介绍了最合适的模拟技术来代表另一种类型的液体喷射器。它还旨在将计算流体动力学模拟方法扩展到更大比例的混合火箭。为了验证计算流体动力学输出，已经使用了来自实验室规模和大型发动机的实验结果。研究的不同几何形状包括不带隔膜的圆柱状颗粒的大型发动机，在燃料颗粒内部带单孔隔膜的同一枚火箭和带单孔隔膜的实验室规模的火箭。模拟是稳态的，燃烧来自单相化学反应。完全模拟了氧化剂的液体喷射，但忽略了燃料的石蜡夹带。计算流体动力学结果与本研究中感兴趣的弹道参数的相应实验（腔室压力，效率和C〜*）具有很好的一致性。计算流体动力学结果证明，所提出的仿真技术可应用于任何混合火箭规模。

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  • 来源
    《Journal of propulsion and power》 |2015年第5期|1458-1469|共12页
  • 作者

    M. Lazzarin; M. Faenza; F. Barato; N. Bellomo; A. Bettella; D. Pavarin;

  • 作者单位

    University of Padua, 35131 Padova, Italy;

    University of Padua, 35131 Padova, Italy;

    University of Padua, 35131 Padova, Italy;

    University of Padua, 35131 Padova, Italy;

    University of Padua, 35131 Padova, Italy;

    University of Padua, 35131 Padova, Italy;

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  • 正文语种 eng
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