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Moiré Deflection Tomography: Application in Visualization and Diagnosis of Compressible Flow Fields(莫尔层析技术在可压缩流场中的应用(英文版))


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Moiré Deflection Tomography: Application in Visualization and Diagnosis of Compressible Flow Fields(莫尔层析技术在可压缩流场中的应用(英文版))
  • 书号:9787030799807
    作者:陈云云
  • 外文书名:
  • 装帧:平装
    开本:B5
  • 页数:194
    字数:300000
    语种:zh-Hans
  • 出版社:科学出版社
    出版时间:2024-12-01
  • 所属分类:
  • 定价: ¥159.00元
    售价: ¥159.00元
  • 图书介质:
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本书围绕莫尔层析技术用于高温复杂流场的结构显示和关键参数诊断展开,主要包含如下几个方面。①理论方面:莫尔层析技术用于流场诊断时所需的折射率模型的建立、流场折射率梯度变化的物理本质的探究等;②实验方面:实验过程中相关问题对结果的影响以及基于标量衍射理论对这样的影响进行相关解释与验证等;③信息提取方面:相位信息提取、频谱提取、相位提取、偏折角信息的获得以及折射率重建等;④被测流场关键参数测量方面:温度、电子数密度等关键参数反演等;⑤方法拓展的探究:围绕该技术在大气领域中的拓展应用等进行了探究。
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目录

  • Contents
    Chapter 1 A brief history 1
    1.1 Moiré effect 1
    1.2 Moiré deflectometry 1
    1.3 Moiré deflection tomography 2
    1.4 The scope of the book 4
    Chapter 2 Theoretical basis of flow field’s moiré deflection tomographydiagnosis 6
    2.1 Dependence between refractive index and key parameters of flow fields 6
    2.2 A new refractive index descriptive model of common plasma 8
    2.2.1 Derivation based on Saha equation 8
    2.2.2 Feasibility verification and analysis 11
    2.3 A uniform refractive index description 15
    2.3.1 Concept of equivalent particle number density 15
    2.3.2 Rationality of the model 17
    2.4 Physical essence of refractive index gradient in flow fields 22
    2.4.1 Refractive index distributions 22
    2.4.2 Physical essence analysis 23
    2.5 A two-temperature refractive index model 26
    2.5.1 Theory and rationality analysis 26
    2.5.2 Method of measuring two temperatures 28
    Chapter 3 Experiment of flow field’s moiré deflection tomography diagnosis 30
    3.1 Effect of non-collimated optical path 31
    3.1.1 Realization of experiment 31
    3.1.2 Influence on temperature reconstruction 36
    3.2 Effect of phase object’s position 38
    3.2.1 Theoretical deduction by scalar diffraction theory 38
    3.2.2 Intensity distribution and fringe equation 44
    3.2.3 Verification by moiré fringe slope 49
    3.3 Integrating moiré deflection tomography and shadowing method 51
    3.3.1 Principle description and experimental design 51
    3.3.2 Feasibility analysis 53
    Chapter 4 Information extraction of moiré fringes 55
    4.1 Preprocessing based on multiresolution analysis (MRA) 56
    4.1.1 Basic theory 56
    4.1.2 Results and comparison of three-level MRA 57
    4.2 Phase extraction based on Gabor wavelet 63
    4.2.1 Deduction of wrapped phase 64
    4.2.2 Comparative analysis based on true phase results 66
    4.3 Phase extraction based on Morlet wavelet 70
    4.3.1 Fringe preprocessing and wrapped phase deduction 70
    4.3.2 Phase information 73
    4.3.3 Contribution of wavelet ridges 77
    4.4 Phase denoising and unwrapping based on MRA 79
    4.4.1 Theory and method 81
    4.4.2 Effect of noise and discontinuity 84
    4.4.3 Effect of wavelet basis function 87
    4.4.4 Effect of decomposition level 88
    4.4.5 Effect of iteration number 89
    4.5 Application of deep learning 91
    4.5.1 Impact of flow field’s position on moiré fringe analysis 92
    4.5.2 Moiré fringe analysis across diverse carrier frequencies 104
    Chapter 5 Measurement of key parameters for flow fields by moiré deflection tomography 117
    5.1 Temperature measurement 117
    5.1.1 Effect of composition 117
    5.1.2 Effect of pressure 142
    5.2 Electron number density measurement 148
    5.2.1 Indirect measurement by one-wavelength moiré deflection tomography 148
    5.2.2 Direct measurement by two-wavelength moiré deflection tomography 154
    5.3 Composition ratio measurement 160
    5.3.1 Two objects mixed 161
    5.3.2 Three objects mixed 161
    Chapter 6 Application of moiré deflectometry in atmosphere measurement 163
    6.1 Measurement of atmospheric particle number density fluctuations 164
    6.1.1 Principle analysis 164
    6.1.2 Theoretical deduction 165
    6.1.3 Experiment and arrival angles 167
    6.1.4 Distribution of atmospheric particle number density fluctuations 173
    6.2 Measurement of atmospheric refractive-index structure parameter 174
    6.2.1 Situation analysis 174
    6.2.2 Method description 176
    6.2.3 Temporal and spatial distributions of deflection angle 178
    6.2.4 Distribution of atmospheric refractive-index structure parameter 182
    References 184
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