Mathematical modeling and high-speed imaging of technical combustion processes

Juergen M. Wolfrum

doi:10.1117/12.209630

30 May 1995 Mathematical modeling and high-speed imaging of technical combustion processes

Juergen M. Wolfrum

Proceedings Volume 2513, 21st International Congress on: High-Speed Photography and Photonics; (1995) https://doi.org/10.1117/12.209630
Event: High-Speed Photography and Photonics: 21st International Congress, 1994, Taejon, Korea, Republic of

Abstract

The high spectral brightness and short pulse duration of tunable high power excimer lasers allows the 2D and 3D application of techniques like laser-induces fluorescence (LIF), Mie and Rayleigh scattering for high speed imaging in industrial applications. The construction of these lasers allows easy transportation and installation to perform measurements at industrial applications. The construction of these lasers allows easy transportation and installation to perform measurements at industrial facilities which can not be moved. In combination with suitable filters and gated image-intensified CCD cameras techniques are now available to measure multidimensional distributions of temperatures and concentrations. Simultaneous measurements of temperature fields and hydroxyl radical distributions were performed to study the influence of turbulence on large premixed natural gas flames. A combination of temperature and nitric oxide concentration measurements yielded information about the correlations between NO formation and burner design in domestic gas burners. Detailed experimental studies on the carbon dioxide-laser induced ignition of CH₃OH/O₂-mixtures in quartz reactor are performed to supply quantitative data for direct comparison with the numerical results of a mathematical model for ignition processes in 2D geometries. Temporally and spatially resolved measurements of flame position and OH concentration are presented for different conditions and compared directly to the computational results. LIF, Rayleigh and Mie scattering were used for measurements of temperature fields, fuel and OH radical distributions in engines. Finally a novel type of combustion control system for municipal waste incinerators using fast infrared thermography to obtain information about the temperature distribution in the furnace interior is described. A fast scanner camera operating in the mid infrared was installed which allows the direct imaging of the fuel bed through the overlying flame and flue gas atmosphere and rapid determination of temperature distribution.

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Juergen M. Wolfrum "Mathematical modeling and high-speed imaging of technical combustion processes", Proc. SPIE 2513, 21st International Congress on: High-Speed Photography and Photonics, (30 May 1995); https://doi.org/10.1117/12.209630

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KEYWORDS

Combustion

Temperature metrology

Cameras

Excimer lasers

Luminescence

Laser induced fluorescence

CCD cameras

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