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Monte Carlo assessment of solid propellant burning rate measurement.

机译：蒙特卡洛评估固体推进剂燃烧速率的测量。

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摘要

Two new methods for determining the burn rate of solid propellant have been developed for the ultrasonic pulse-echo technique. These methods are digital as opposed to the analog method that had been used in the past. The work presented is an uncertainty analysis of the two new methods as well the old method. A previous uncertainty analysis assumed that the propagation time uncertainty was constant throughout the burn; however, this may not be the case. A parametric study was performed that varied the propagation time uncertainty over a range where it was thought to lie. Monte Carlo simulations were chosen because of their simplicity. The results showed that the uncertainty of the new digital methods, 4.2% to 5.7%, compared very well to the uncertainty of the analog method, 3.5% to 5%. An uncertainty analysis was also performed on the temperature sensitivity of the propellant. The results showed that uncertainty was high varying from 40% to 78% for the conditions investigated, but this could be attributed to the small number of samples that were tested.
机译：已经为超声脉冲回波技术开发了两种确定固体推进剂燃烧速率的新方法。这些方法是数字方法，与过去使用的模拟方法相反。提出的工作是对两种新方法以及旧方法的不确定性分析。先前的不确定性分析假设传播时间的不确定性在整个燃烧过程中是恒定的。但是，事实并非如此。进行了一项参数研究，该研究在被认为存在的范围内改变了传播时间的不确定性。选择蒙特卡洛模拟是因为其简单性。结果表明，新数字方法的不确定度为4.2％至5.7％，而模拟方法的不确定度为3.5％至5％。还对推进剂的温度敏感性进行了不确定性分析。结果表明，在所研究的条件下，不确定度很高，从40％到78％不等，但这可能是由于测试的样品数量少所致。

著录项

  • 作者

    Evans, John A.;

  • 作者单位

    The University of Alabama in Huntsville.;

  • 授予单位 The University of Alabama in Huntsville.;
  • 学科 Engineering General.;Engineering Aerospace.
  • 学位 M.S.E.
  • 年度 2013
  • 页码 153 p.
  • 总页数 153
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 TS97-4;
  • 关键词

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