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首页> 外文期刊>Journal of Spacecraft and Rockets >Fragment Acceleration Modeling for Pressurized Tank Burst
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Fragment Acceleration Modeling for Pressurized Tank Burst

机译：加压罐爆裂的碎片加速建模

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摘要

As part of comprehensive efforts to develop physics-based risk assessment techniques for space systems at NASA, coupled computational fluid and rigid-body dynamic simulations are carried out to investigate the flow mechanisms that accelerate tank fragments in bursting pressurized vessels. Simulations of several configurations are compared to analyses based on the industry-standard Baker-type explosion model, and they are used to formulate an improved version of the model. A validation against the experiment is carried out for one configuration. The standard model, which neglects an external fluid, is found to agree best with simulation results only in configurations where the internal-to-external pressure ratio is very high. An improved model introduces terms that accommodate an external fluid and better account for the pressure at the fragment wall. A physics-based analysis is critical in increasing the model's range of applicability. The improved tank burst model can be used to produce more accurate risk assessments of space vehicle failure modes that involve high-speed debris, such as exploding propellant tanks and bursting rocket engines.
机译：作为开发针对NASA太空系统的基于物理学的风险评估技术的综合努力的一部分，进行了计算流体和刚体动力学模拟的耦合研究，以研究加速爆破加压容器中油箱碎片的流动机理。将几种配置的模拟与基于行业标准Baker型爆炸模型的分析进行比较，并将其用于制定模型的改进版本。针对一种配置对实验进行了验证。忽略外部流体的标准模型仅在内部与外部压力比非常高的配置中才与模拟结果最吻合。改进的模型引入了可容纳外部流体的术语，并更好地说明了碎片壁处的压力。基于物理的分析对于增加模型的适用范围至关重要。改进的坦克爆炸模型可用于对涉及高速碎片（例如爆炸式燃料箱和火箭发动机爆炸）的航天器故障模式进行更准确的风险评估。

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  • 来源
    《Journal of Spacecraft and Rockets》 |2017年第3期|755-768|共14页
  • 作者

    Manning Ted A.; Lawrence Scott L.;

  • 作者单位

    NASA, Ames Res Ctr, Computat Phys Branch, NASA Adv Supercomp Div, MS 258-2, Moffett Field, CA 94035 USA;

    NASA, Ames Res Ctr, Syst Anal Off, MS258-1, Moffett Field, CA 94035 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
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