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首页> 外文学位 >Analysis and implementation of PM sampling methodology protocols to aid in the development of an ARP (aerospace recommended practice) for aircraft non-volatile PM measurements.
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Analysis and implementation of PM sampling methodology protocols to aid in the development of an ARP (aerospace recommended practice) for aircraft non-volatile PM measurements.

机译：PM采样方法协议的分析和实施，以帮助开发用于飞机非易失性PM测量的ARP（航空航天推荐做法）。

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摘要

Due to the growing concerns that particulate matter (PM) have on health and the environment, there is a need to include mass and number non-volatile PM measurements to current jet engine certification. This thesis looks at the necessary work required to help produce recommendations and perform background research to aid in the creation of an improved Aerospace Recommended Practice (ARP) (by the SAE E-31 Committee). This work addressed the following issues. The investigation began in the Missouri S&T Center of Excellence for Aerospace Particulate Emissions Reduction Research (COE) laboratory with an examination of the jet engine surrogate used, the miniCAST, as well as integrating it into the COE's PM measurement system. A clean PM sample line was aged by running a PM source through it until a steady state signal was measured by the instruments in order to make a recommended procedure for line conditioning as well as reconditioning. Several eductors were studied for their performance characteristics and compared against desired characteristics, which suggested a need to include a pressure relief valve to cap the sample pressure at the eductor entrance. A volatile particle remover (VPR) was studied for penetration and ability to remove volatile material. A prototype E-31 system was setup at the second alternative aviation fuel experiment (AAFEX II), which provided a direct comparison of probe tip dilution and downstream dilution and found comparable results when line loss was taken into account. Also performed at AAFEX II was a study that compared measured sample line penetration with theoretical calculations finding that theoretical calculations were an accurate alternative of measuring line loss. Two PM sampling systems were setup at an ARP demonstration and both system had similar results for both number and mass measurement. An instrument comparison was also performed that included an examination of condensation particle counter (CPC) cutoff size. It was also determined that a VPR was necessary to ensure that number instrument devices were only measuring non-volatile PM.
机译：由于人们越来越关注颗粒物（PM）对健康和环境的影响，因此需要将质量和数量的非挥发性PM测量纳入当前的喷气发动机认证中。本文着眼于必要的工作，以帮助提出建议并进行背景研究，以帮助创建改进的航空航天推荐规范（ARP）（由SAE E-31委员会负责）。这项工作解决了以下问题。这项调查始于密苏里州科学技术卓越航空航天减排中心（COE）实验室，检查了使用的喷气发动机替代品miniCAST，并将其集成到COE的PM测量系统中。清洁的PM采样管线通过运行一个PM源进行老化，直到仪器测量到稳态信号为止，以便为管线调整和重新调整提出建议的程序。研究了几种喷射器的性能特征，并将其与所需特性进行了比较，这表明需要包括一个卸压阀以限制喷射器入口处的样品压力。研究了挥发性颗粒去除剂（VPR）的渗透性和去除挥发性物质的能力。在第二个替代航空燃料实验（AAFEX II）上建立了原型E-31系统，该系统可直接比较探针尖端的稀释度和下游的稀释度，并在考虑了线损的情况下得出了可比的结果。在AAFEX II上还进行了一项研究，该研究将测得的样品线渗透率与理论计算进行了比较，发现理论计算是测量线损的准确替代方法。在ARP演示中安装了两个PM采样系统，并且两个系统在数量和质量测量方面都具有相似的结果。还进行了仪器比较，其中包括检查冷凝粒子计数器（CPC）的截止尺寸。还确定必须使用VPR，以确保数字仪器仅测量非易失性PM。

著录项

  • 作者

    Catron, Brian Lowell.;

  • 作者单位

    Missouri University of Science and Technology.;

  • 授予单位 Missouri University of Science and Technology.;
  • 学科 Aerospace engineering.
  • 学位 M.S.
  • 年度 2014
  • 页码 119 p.
  • 总页数 119
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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