Flame imaging using laser-based transmission tomography

Mohamad, Elmy Johana; Rahim, Ruzairi Abdul; Ibrahim, Suhaimi; Sulaiman, Siti Zubaidah; Manaf, Mohamad Shukri Abdul

doi:10.1016/j.sna.2005.12.031

Cited by 14 publications

(9 citation statements)

References 5 publications

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“…More recent studies [18][19][20][21][22][23] have considered in situ applications with optical access restrictions and so lower numbers of views. Reconstructions of Refractive Index (RI) measurements have been performed using CT for flow visualisation purposes [24,25] and to provide temperature and density information [26][27][28][29], in some cases in 3D by stacking sections [26,27,17,29].…”

Section: Introductionmentioning

confidence: 99%

Computed Tomography of Chemiluminescence (CTC): Instantaneous 3D measurements and Phantom studies of a turbulent opposed jet flame

Floyd

Geipel

Kempf

2011

Combustion and Flame

172

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Section: Introductionmentioning

confidence: 99%

Computed Tomography of Chemiluminescence (CTC): Instantaneous 3D measurements and Phantom studies of a turbulent opposed jet flame

Floyd

Geipel

Kempf

2011

Combustion and Flame

172

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“…In order to utilize TDLAS for 2D temperature and species concentration measurements, multiple laser projections (each with an array of paralleled laser beams) are used and then temperature and species concentrations are given by inversion algorithms. 265,266 In traditional TDLAS methods, only one or two wavelengths are analyzed. For such arrangements, the equations generated are not enough to solve the equation system unless a great number of projections are implemented.…”

Section: Tomography Techniquesmentioning

confidence: 99%

Advanced Laser-Based Techniques for Gas-Phase Diagnostics in Combustion and Aerospace Engineering

Ehn

Zhu

et al. 2017

Appl Spectrosc

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Gaining information of species, temperature, and velocity distributions in turbulent combustion and high-speed reactive flows is challenging, particularly for conducting measurements without influencing the experimental object itself. The use of optical and spectroscopic techniques, and in particular laser-based diagnostics, has shown outstanding abilities for performing non-intrusive in situ diagnostics. The development of instrumentation, such as robust lasers with high pulse energy, ultra-short pulse duration, and high repetition rate along with digitized cameras exhibiting high sensitivity, large dynamic range, and frame rates on the order of MHz, has opened up for temporally and spatially resolved volumetric measurements of extreme dynamics and complexities. The aim of this article is to present selected important laser-based techniques for gas-phase diagnostics focusing on their applications in combustion and aerospace engineering. Applicable laser-based techniques for investigations of turbulent flows and combustion such as planar laser-induced fluorescence, Raman and Rayleigh scattering, coherent anti-Stokes Raman scattering, laser-induced grating scattering, particle image velocimetry, laser Doppler anemometry, and tomographic imaging are reviewed and described with some background physics. In addition, demands on instrumentation are further discussed to give insight in the possibilities that are offered by laser flow diagnostics.

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“…Abdul Rahim also had used this type of algorithm in his research where the concept of the algorithm is based on sensitivity maps [28]. Moreover, Mohamad used LBP to investigate the concentration profile of flame image by using 8 × 8 sensors pairs [29]. This algorithm provides the some improvement of the tomogram where it actually based on LBP but some changes is made.…”

Section: A Signal Conditioning Circuitmentioning

confidence: 99%