Continuous temperature measurements in turbulent combustion by laser-beam deflection tomography

Klaus Gerstner; Andreas Fehl; Joern Otten; Dirk Neidhardt; Theo T. Tschudi

doi:10.1117/12.293402

21 November 1997 Continuous temperature measurements in turbulent combustion by laser-beam deflection tomography

Klaus Gerstner, Andreas Fehl, Joern Otten, Dirk Neidhardt, Theo T. Tschudi

Proceedings Volume 3172, Optical Technology in Fluid, Thermal, and Combustion Flow III; (1997) https://doi.org/10.1117/12.293402
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

Beam-deflection optical tomography was applied to measure the 2D temperature field of a turbulent hydrogen diffusion flame. The temperature distribution calculated with a filtered back-projection algorithm agrees well with the result of a temperature measurement using Raman spectroscopy. This was proved with a high number of projections. For enclosed flames wit restricted optical access and in the case of time-continuous measurements, however, the number of sampling points and viewing directions is limited. In this case, algebraic reconstruction techniques are well suited for tomography. These algorithms have been adapted for temperature measurements in flames by laser beam deflection. Experiments and simulations were performed to estimate the spatial resolution and accuracy with a varying number of input data.

Citation Download Citation

Klaus Gerstner, Andreas Fehl, Joern Otten, Dirk Neidhardt, and Theo T. Tschudi "Continuous temperature measurements in turbulent combustion by laser-beam deflection tomography", Proc. SPIE 3172, Optical Technology in Fluid, Thermal, and Combustion Flow III, (21 November 1997); https://doi.org/10.1117/12.293402

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