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Theoretical and experimental investigations in planetary dust adhesion.

机译:行星尘埃附着力的理论和实验研究。

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摘要

An investigation was conducted to evaluate the effect of different planetary environmental conditions on mineral dust adhesion. In planetary exploration, dust contamination affects radiator, solar cell, optical lens, and mirror performance. An improved understanding of the fundamental mechanisms by which surfaces attract dust is important for the development of dust mitigation techniques that will increase the duration and success of future planetary science exploration initiatives. Dust mechanics and adhesion research also has applications in semiconductor, xerography, paint, air-pollution, pesticide, sand paper, oil recovery, and pharmaceutical manufacturing industries.; Since Mars and comet exploration is on the forefront of current NASA mission planning, a review of Martian and cometary dust properties is presented. The present state of knowledge regarding dust adhesion is summarized. A model for determining dust adhesion is derived that incorporates capillary, van der Waals, and electrostatic forces. The model accounts for elastic particle deformation and the potential of an adsorbed layer of gas separating the particles. Dust adhesion was measured in laboratory using a vibrating cantilever beam apparatus under different environmental conditions. Results from the experiments, as well as laboratory measurements previously taken by others, match model predictions relatively well. The model is extended to predict dust adhesion on Mars and comets.
机译:进行了一项研究,以评估不同的行星环境条件对矿物粉尘粘附的影响。在行星探测中,灰尘污染会影响散热器,太阳能电池,光学透镜和反射镜的性能。更好地理解表面吸引灰尘的基本机制对于减少灰尘的技术的发展很重要,这将增加未来行星科学探索计划的持续时间和成功。灰尘力学和附着力研究还应用于半导体,静电复印,油漆,空气污染,农药,砂纸,石油回收和制药行业。由于火星和彗星探测处于当前NASA任务计划的最前沿,因此对火星和彗星尘埃特性进行了综述。总结了关于粉尘粘附的当前知识状态。推导了一个确定灰尘附着力的模型,该模型结合了毛细管,范德华力和静电力。该模型考虑了弹性颗粒变形和分离颗粒的气体吸附层的潜力。在实验室中使用振动悬臂梁装置在不同的环境条件下测量灰尘的附着力。来自实验的结果以及其他人先前进行的实验室测量,与模型预测相对较好。扩展该模型以预测粉尘在火星和彗星上的附着。

著录项

  • 作者

    Perko, Howard Anthony.;

  • 作者单位

    Colorado State University.;

  • 授予单位 Colorado State University.;
  • 学科 Engineering Civil.
  • 学位 Ph.D.
  • 年度 2002
  • 页码 213 p.
  • 总页数 213
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 建筑科学;
  • 关键词

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