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基于截面SEM数据特征的微尘三维形貌建模方法

周林宏1,何光宇2,臧顺来1   

  1. 1. 西安交通大学机械工程学院航空发动机研究所
    2. 空军工程大学
  • 收稿日期:2021-08-06 修回日期:2021-11-25 出版日期:2021-12-01 发布日期:2021-12-01
  • 通讯作者: 臧顺来
  • 基金资助:
    国家科技重大专项

A Method on Modeling Three-dimensional Morphology of Dust Particle Based on Cross-sectional SEM Data Characteristics

Lin_Hong ZHOU1, Shun-Lai ZANG   

  • Received:2021-08-06 Revised:2021-11-25 Online:2021-12-01 Published:2021-12-01
  • Contact: Shun-Lai ZANG
  • Supported by:
    National Science and Technology Major Project

摘要: 多尘环境下服役的航空航天装备其性能受到微尘的严重影响,如沙漠起降的军用直升机、运输机和火星多尘表面使用的火星车等。为加强航空航天装备的防尘设计,微尘的三维形貌十分关键且影响着微尘的气动和附着等特性,但由于微尘粒径分布宽、成分复杂、外形不规则,获得精确的微尘三维形貌十分困难。本文提出了一种基于截面SEM数据特征的微尘三维形貌建模方法,通过逐层剥离获得高精度的砂尘断层二维图像,基于距离变换的层间插值方法,实现微尘三维形貌重构。以粒径100μm微尘样品,利用所提出方法进行了三维形貌重构和分析,获得了500个砂尘的精确三维形貌。本文定量化表征了微尘的三维形貌,形成了微尘的外形特性分析方法,为研究微尘气动、反弹与吸附特性提供了微尘的形貌数据,进而推动航空发动机冲蚀防护、航空发动机气体力学与航天探测器的研究,对航空航天装备的防尘设计有重要意义。

关键词: 航空航天装备, 微尘, 几何特征, 图像处理, 三维形貌

Abstract: The performance of aerospace equipment in dusty environment is seriously affected by dust particle, such as military helicopters and transport planes taking off and landing in the desert and Mars rovers used on the dusty surface of Mars. To strengthen the dustproof design of aerospace equipment, the three-dimensional morphology of dust particle is very important and affects the aerodynamic and adhesion characteristics of dust particle. However, due to the wide particle size distribution, complex composition and irregular shape, it is very difficult to obtain accurate three-dimensional morphology of dust particle. In this paper, a novel method on modeling three-dimensional morphology of dust particle based on cross-sectional SEM data characteristics is presented. The tomographic images with high resolution are obtained by layers peeling of dust particle samples. The three-dimensional morphology reconstruction of dust particle is realized based on the interlayer interpolation method of distance transformation. The presented method is used to reconstruct and analyze the three-dimensional morphology of dust particle samples with a particle size of 100μm. The accurate three-dimensional morphologies of 500 dust particles are obtained. In this paper, the three-dimensional morphology of dust particle is quantitatively characterized, and the analysis method of the shape characteristics of dust particle is formed. It provides the morphology data of dust particles for studying the aerodynamic, rebound and adsorption characteristics of dust particles, and then promotes the research of aero-engine erosion protection, aero-engine aerodynamics and space probe, which is meaningful for the dustproof design of aerospace equipment.

Key words: aerospace equipment, dust particle, geometric feature, image processing, three-dimensional morphology

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