Moiré Deflection Tomography.

Format:

Book

Author/Creator:

CHEN, Yun-yun.

Series:

Current Natural Sciences Series

Language:

English

Subjects (All):

Flow visualization.

Tomography.

Physical Description:

1 online resource (202 pages)

Edition:

1st ed.

Place of Publication:

Les Ulis : EDP Sciences, 2025.

Summary:

This book presents a comprehensive exploration of moiré tomography and its application to structural visualization and key-parameter diagnosis in high-temperature complex flow fields.

Contents:

Cover-1

Cover-2

Moiré Deflection Tomography: Application in Visualization and Diagnosis of Compressible Flow Fields

Contents

Chapter 1 A brief history

1.1 Moiré effect

1.2 Moiré deflectometry

1.3 Moiré deflection tomography

1.4 The scope of the book

Chapter 2 Theoretical basis of flow field's moiré deflection tomography diagnosis

2.1 Dependence between refractive index and key parameters of flow fields

2.2 A new refractive index descriptive model of common plasma

2.2.1 Derivation based on Saha equation

2.2.2 Feasibility verification and analysis

2.3 A uniform refractive index description

2.3.1 Concept of equivalent particle number density

2.3.2 Rationality of the model

2.4 Physical essence of refractive index gradient in flow fields

2.4.1 Refractive index distributions

2.4.2 Physical essence analysis

2.5 A two-temperature refractive index model

2.5.1 Theory and rationality analysis

2.5.2 Method of measuring two temperatures

Chapter 3 Experiment of flow field's moiré deflection tomography diagnosis

3.1 Effect of non-collimated optical path

3.1.1 Realization of experiment

3.1.2 Influence on temperature reconstruction

3.2 Effect of phase object's position

3.2.1 Theoretical deduction by scalar diffraction theory

3.2.2 Intensity distribution and fringe equation

3.2.3 Verification by moiré fringe slope

3.3 Integrating moiré deflection tomography and shadowing method

3.3.1 Principle description and experimental design

3.3.2 Feasibility analysis

Chapter 4 Information extraction of moiré fringes

4.1 Preprocessing based on multiresolution analysis (MRA)

4.1.1 Basic theory

4.1.2 Results and comparison of three-level MRA

4.2 Phase extraction based on Gabor wavelet

4.2.1 Deduction of wrapped phase.

4.2.2 Comparative analysis based on true phase results

4.3 Phase extraction based on Morlet wavelet

4.3.1 Fringe preprocessing and wrapped phase deduction

4.3.2 Phase information

4.3.3 Contribution of wavelet ridges

4.4 Phase denoising and unwrapping based on MRA

4.4.1 Theory and method

4.4.2 Effect of noise and discontinuity

4.4.3 Effect of wavelet basis function

4.4.4 Effect of decomposition level

4.4.5 Effect of iteration number

4.5 Application of deep learning

4.5.1 Impact of flow field's position on moiré fringe analysis

4.5.2 Moiré fringe analysis across diverse carrier frequencies

Chapter 5 Measurement of key parameters for flow fields by moiré deflection tomography

5.1 Temperature measurement

5.1.1 Effect of composition

5.1.2 Effect of pressure

5.2 Electron number density measurement

5.2.1 Indirect measurement by one-wavelength moiré deflection tomography

5.2.2 Direct measurement by two-wavelength moiré deflection tomography

5.3 Composition ratio measurement

5.3.1 Two objects mixed

5.3.2 Three objects mixed

Chapter 6 Application of moiré deflectometry in atmosphere measurement

6.1 Measurement of atmospheric particle number density fluctuations

6.1.1 Principle analysis

6.1.2 Theoretical deduction

6.1.3 Experiment and arrival angles

6.1.4 Distribution of atmospheric particle number density fluctuations

6.2 Measurement of atmospheric refractive-index structure parameter

6.2.1 Situation analysis

6.2.2 Method description

6.2.3 Temporal and spatial distributions of deflection angle

6.2.4 Distribution of atmospheric refractive-index structure parameter

References.

Notes:

Description based on publisher supplied metadata and other sources.

Part of the metadata in this record was created by AI, based on the text of the resource.

ISBN:

9782759839292

OCLC:

1549523886