A tomographic technique for the simultaneous imaging of temperature, chemical species, and pressure in reactive flows using absorption spectroscopy with frequency-agile lasers

Kaminski, Clemens F.

doi:10.1063/1.4862754

Cited by 74 publications

(20 citation statements)

References 23 publications

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“…The measurement of flame temperature plays an essential role in combustion diagnostics and is necessary to access an indepth understanding of combustion physics. Several methods have been utilized for flame temperature measurements, such as LIF, moiré deflection, and tunable diode laser absorption spectroscopy (TDLAS) (Kaminski and Kaminski, 2014). However, limited by the complex arrangement of the aforementioned technique, they are somehow unsuitable for industrial requirement.…”

Section: Temperature Measurementmentioning

confidence: 99%

A Survey for 3D Flame Chemiluminescence Tomography: Theory, Algorithms, and Applications

Jin

Situ

2022

Front. Photon.

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Combustion diagnostics play an essential role in energy engineering, transportation, and aerospace industries, which has great potential in combustion efficiency improvement and polluting emission control. The three-dimensional (3D) visualization of the combustion field and the measurement of key physical parameters such as temperature, species concentration, and velocity during the combustion process are important topics in the field of combustion diagnostics. Benefiting from the non-contact and non-intrusive advantages of the optical detection method as well as the advantages of the 3D full-field measurement of the measured field by computational tomography, flame chemiluminescence tomography (FCT) has the ability to realize non-intrusive and instantaneous 3D quantitative measurement and 3D full-field visualization of key physical parameters in the combustion process, which has crucial research significance in combustion diagnostics. In this study, we review the progress of FCT technique. First, we provide an extensive review of practical applications of FCT in state-of-the-art combustion diagnostics and research. Then, the basic concepts and mathematical theory of FCT are elaborated. Finally, we introduce the conventional reconstruction algorithm and proceed to more popular artificial intelligence-based algorithms.

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Section: Temperature Measurementmentioning

confidence: 99%

A Survey for 3D Flame Chemiluminescence Tomography: Theory, Algorithms, and Applications

Jin

Situ

2022

Front. Photon.

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“…Computed tomography with reasonable projections and reconstruction algorithm would be an effective solution to overcome this limitation. [7][8][9][10] However, based on the absorbance integrations along the projections from different angles, only scalar quantities, such as gas concentration and temperature, can be reconstructed simultaneously. Great efforts have been made to improve the accuracy and reduce the computation by probing beam arrangement optimization or various algorithms, such as algebraic reconstruction technique and filtered backprojection.…”

Section: Introductionmentioning

confidence: 99%

In situ measurement on nonuniform velocity distribution in external detonation exhaust flow by analysis of spectrum features using TDLAS

Huang¹,

Li²,

Weng³

et al. 2022

Chinese Phys. B

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Instantaneous and precise velocity sensing is a critical part of research on detonation mechanism and flow evolution. This paper presents a novel multi-projection tunable diode laser absorption spectroscopy solution, to provide a real-time and reliable measurement of velocity distribution in detonation exhaust flow with obvious nonuniformity. Relations are established between overlapped spectrums along probing beams and Gauss velocity distribution phantom according to the frequency shifts and tiny variations in components of light-of-sight absorbance profiles at low frequencies analyzed by the fast Fourier transform. With simulated optical measurement using H2O feature at 7185.6 cm−1 carried out on a phantom generated using a simulation of two-phase detonation by a two-fluid model, this method demonstrates a satisfying performance on recovery of velocity distribution profiles in supersonic flow even with a noise equivalent absorbance up to 2 × 10−3. This method is applied to the analysis of rapidly decreasing velocity during a complete working cycle in the external flow field of an air-gasoline detonation tube operating at 25 Hz, and results show the velocity in the core flow field would be much larger than the arithmetic average from traditional tunable diode laser doppler velocimetry. This proposed velocity distribution sensor would reconstruct nonuniform velocity distribution of high-speed flow in low cost and simple operations, which broadens the possibility for applications in research on the formation and propagation of external flow filed of detonation tube.

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“…The physical and mathematical background of the non-linear LAS tomographic techniques has been detailed in (24,(181)(182)(183). Here, we provide a brief summary of the physics and mathematics to facilitate the discussion in the rest of the paper.…”

Section: Model Establishmentmentioning

confidence: 99%

Laser absorption spectroscopy for combustion diagnosis in reactive flows: A review

Liu

2018

Applied Spectroscopy Reviews

175

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Laser absorption spectroscopy (LAS) has been rapidly developed and widely applied to combustion diagnosis in recent decades. As a costeffective tool for measuring multiple combustion parameters, LAS provides unique properties in terms of accuracy and sensitivity for understanding the reactions and kinetics in reactive flows. Line-ofsight and tomographic LAS techniques have stimulated numerous applications and been proved to be robust for in situ combustion diagnosis in uniform and non-uniform combustion fields, respectively. This review highlights the breakthroughs in the evolution of LAS techniques from the viewpoints of key principles, sensors and instrumentations developed for combustion diagnosis, with particular emphasis on a series of spatially-resolved LAS techniques with their recent applications on obtaining high-fidelity measurement results with minimal intrusion to the practical combustors. Along the way, we note some challenges and requirements for further development of the LAS-based combustion diagnosis.

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A tomographic technique for the simultaneous imaging of temperature, chemical species, and pressure in reactive flows using absorption spectroscopy with frequency-agile lasers

Cited by 74 publications

References 23 publications

A Survey for 3D Flame Chemiluminescence Tomography: Theory, Algorithms, and Applications

A Survey for 3D Flame Chemiluminescence Tomography: Theory, Algorithms, and Applications

In situ measurement on nonuniform velocity distribution in external detonation exhaust flow by analysis of spectrum features using TDLAS

Laser absorption spectroscopy for combustion diagnosis in reactive flows: A review

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