Research on Modulated Thermal Wave Radar Imaging Technique for Photothermal Properties of Semi-transparent Materials

Zhang, Ju-Qi; Qi, Hong; Liu, Shaobin; Niu, Zhi-Tian; Yu, Xiao-Jin; Ren, Ya-Tao

doi:10.1007/s10765-020-02645-4

Cited by 9 publications

(2 citation statements)

References 29 publications

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“…During the last few years, interest in non-destructive testing has increased. Nondestructive photothermal methods have been applied widely in investigating different types of materials [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Investigations of the Thermal Parameters of Hybrid Sol–Gel Coatings Using Nondestructive Photothermal Techniques

et al. 2022

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This article presents the results of comparative investigations of thermal parameters of hybrid sol–gel coatings (named TMZ) prepared from tetraethyl orthosilicate and organically modified 3-methacryloxypropyltrimethoxysilane. The coatings were prepared with the addition of zirconium(IV) tetrapropoxide chelated with methacrylic acid. Two series of samples were investigated: the first series, TMZ-I, TMZ-II and TMZ-III, with different amounts of zirconium, and the second series, TMZ-I/Ce, TMZ-II/Ce and TMZ-III/Ce, with the addition of cerium nitrate. The influence of the amount of zirconium and cerium on the thermal parameters of the sol–gel coatings was next analyzed. Two non-destructive and photothermal techniques were used for this purpose: photothermal radiometry (PTR) and beam deflection spectroscopy (BDS). The thermal diffusivity and conductivity of the coatings were extracted from the frequency experiments and are presented and discussed. The two-layer model was applied to interpret the photothermal spectra. The results obtained using these two techniques are compared and discussed.

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Section: Introductionmentioning

confidence: 99%

Investigations of the Thermal Parameters of Hybrid Sol–Gel Coatings Using Nondestructive Photothermal Techniques

et al. 2022

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“…Infrared characteristics calculations for aircraft are closely related to skin material properties, aerothermal effects, exhaust plume properties, and environmental conditions. Different characteristics of surface materials, such as emissivity, absorption, and reflectivity, result in different IR properties and, thus, different temperature and radiation distributions [ 7 , 8 , 9 , 10 ]. High-speed relative movement of aircraft and the air leads to aerodynamic heating, which is also an important source of radiation [ 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Integrated Infrared Radiation Characteristics of Aircraft Skin and the Exhaust Plume

Zhang

Jiang

et al. 2022

Materials

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Infrared radiation (IR) characteristics are important parameters for detecting, identifying, and striking military targets in the context of systematic countermeasures. Accurate calculation of IR characteristics for aircraft is significant for the simulation of war situations and the designation of combat strategy. In this work, integrated IR characteristics of aircraft skin and exhaust plume and their interaction are investigated by considering the reflection based on a bi-directional reflectance distribution function and various influence factors such as solar irradiation, ground reflection, aerodynamic heating, and projection radiation from the background. Combined with infrared emission and reflection characteristics of the skin, omnidirectional IR intensity distributions of 3−5 μm and 8−14 μm at different Mach numbers are obtained. The exhaust plume IR characteristic for different waves and wavebands are also investigated by considering the presence or absence of base and the difference in nozzle inlet temperature. On this basis, integrated IR characteristics between the skin and exhaust plume are investigated. Results show that aircraft IR characteristics of 3−5 μm are concentrated in the exhaust plume and high-temperature skin near the exhaust plume, while the signals of 8−14 μm are concentrated in the skin. The research results are expected to supply guidance for better detection and identification of typical flight targets.

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Numerical Stability of Quantitative Characterization of Surface Cracks Using Laser Lock-in Thermography

Yang¹,

Dong²,

Wang³

et al. 2022

Int J Thermophys

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Research on Modulated Thermal Wave Radar Imaging Technique for Photothermal Properties of Semi-transparent Materials

Cited by 9 publications

References 29 publications

Investigations of the Thermal Parameters of Hybrid Sol–Gel Coatings Using Nondestructive Photothermal Techniques

Investigations of the Thermal Parameters of Hybrid Sol–Gel Coatings Using Nondestructive Photothermal Techniques

Integrated Infrared Radiation Characteristics of Aircraft Skin and the Exhaust Plume

Numerical Stability of Quantitative Characterization of Surface Cracks Using Laser Lock-in Thermography

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