Flame imaging using laser-based transmission tomography

Abstract

This paper described the development of flame imaging system using laser-based tomography. The final aim of this project is to obtain the concentration profile of the flame to be incorporated in laser-based transmission tomography measurement system for combustion online monitoring. The system can be applied to produce cross-sectional images of flame such as that in a combustion chamber. Such a system can be employed to compare the effectiveness of different fuel additives and to monitor the onset of knock with various fuel formulations or cylinder head geometries. The ability of this system is to monitor the size, position and velocity of flame fronts in any combustion behavior and emissions. The system employs two orthogonal projections with one laser source. The concentration of the research is to determine the position and velocity of flame fronts in the pipeline by employing photodiode sensor and helium neon laser. The laser source will supply 12 light beams, so the cross-section of the pipe being interrogated by a total of 12 beams. The flame is placed in specific places in the measurement cross-section and voltage output will calculated by the individual sensor is modeled. Besides the hardware, the system will include an interface user friendly, Visual C++ to visualize the concentration profile of the flame.