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首页> 外文期刊>Acta astronautica >Ignition and Burn in a Hybrid Nuclear Fuel for a Pulsed Rocket Engine
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Ignition and Burn in a Hybrid Nuclear Fuel for a Pulsed Rocket Engine

机译：在脉冲火箭发动机的混合核燃料中点火和燃烧

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摘要

This work explores the parameter space of a cylindrical hybrid nuclear fuel in support of a z-pinch driven pulsed fission-fusion (PuFF) engine. 0D power balance and 1D burn wave calculations have been performed to explore the parameter space of hybrid cylindrical nuclear fuels. The boundary of minimal initial conditions needed to reach breakeven are found within the context of the model. The effects of initial conditions upon the yield at the end of burn wave expansion are also determined. The model is used to examine the minimum initial energies predicted to result in yields of a few MJ. The goal of this work is to guide fuel design, inform future models and experiments as well as look for the most efficient parameter space for ignition in a z-pinch driven hybrid nuclear reaction. The impact of initial parameters upon ignition, burn, and gain are discussed. It is found that a hybrid cylindrical target may breakeven with initial energy near the axis of approximately 4-6 MJ in lithium deuteride/uranium 235 fuel. It is also found that magnetic field can lower the threshold further of which the magnitude changes across the parameter space. The dual fusion/fission reactions are found to boost each other leading to lower initial driving energies needed to reach breakeven in the hybrid cylindrical nuclear fuel.
机译：这项工作探讨了柱面混合核燃料的参数空间，以支撑Z-Pinch驱动的脉冲裂变 - 融合（PUFF）发动机。已经进行了0D功率平衡和1D燃烧波计算以探索混合动力圆柱核燃料的参数空间。在模型的背景下发现到达Breakeven所需的最小初始条件的边界。还确定了初始条件对燃烧波膨胀结束时屈服的影响。该模型用于检查预测的最小初始能量，以导致几MJ的产量。这项工作的目标是指导燃料设计，通知未来的模型和实验，并在Z-Pinch驱动的混合核反应中寻找点火的最有效参数空间。讨论了点火，烧伤和增益时初始参数对初始参数的影响。结果发现，混合圆柱形靶靶可以在锂氘/铀235燃料中靠近约4-6MJ的轴线附近的初始能量。还发现，磁场可以进一步降低阈值，其中幅度在参数空间上变化。发现双重融合/裂变反应互相升高，导致较低的初始驱动能量，以达到混合圆柱核燃料的盈亏平衡。

著录项

  • 来源
    《Acta astronautica》 |2020年第10期|465-475|共11页
  • 作者

    Taylor B.; Cassibry J.; Adams R.;

  • 作者单位

    NASA Marshall Space Flight Ctr Huntsville AL 35812 USA|Univ Alabama Prop Res Ctr 301 Sparkman Dr Huntsville AL 35899 USA;

    Univ Alabama Prop Res Ctr 301 Sparkman Dr Huntsville AL 35899 USA;

    NASA Marshall Space Flight Ctr Huntsville AL 35812 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Nuclear; Fission; Fusion; Advanced Propulsion;

    机译：核;裂变;融合;先进的推进;

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