doi: 10.17586/2226-1494-2015-15-2-211-217


NON-INTRUSIVE GAS-PHASE THERMOMETRY FOR INDUSTRIAL OXY-FUEL BURNERS

J. W. Tröger, T. Seeger


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For citation: Tröger J.W., Seeger T. Non-intrusive gas-phase thermometry for industrial oxy-fuel burners. Scientific and Technical Journal of Information Technologies, Mechanics and Optics, 2015, vol.15, no. 2, pp. 211–217. (in English)

Abstract
The use of oxy-fuel combustion processes is of large interest for several industrial fields applications since it offers the advantages of low NOx emissions in combination with high combustion temperatures even without additional preheating. For optimization of such processеs a detailed understanding based on precise experimental data is necessary. So far there is still a lack of precise experimental data achieved with high spatial and temporal resolution from industrial relevant turbulent oxy-fuel combustion processes. Beside species concentration information the gas phase temperature is of utmost importance for an improved understanding of the basic chemical reactions and the pollutant formation. The coherent anti-Stokes Raman spectroscopy (CARS) technique is a very well suited laser based tool for a non-intrusive investigation of such turbulent high temperature combustion processes. In this work we analysed an industrial 400 kW oxy-fuel burner with the help of O2 based vibrational CARS system which is integrated in an industrial relevant test furnace. The burner is fed with pure oxygen and natural gas at an equivalence ratio of =0.9. At one downstream position temporal and spatial resolved temperatures were measured along a 600 mm line. Additional air sucked in from the environment seems to influence the gas phase temperature significantly.

Keywords: vibrational coherent Anti-Stokes Raman scattering, spectroscopy, temperature measurement, oxy-fuel combustion, combustion diagnostic.

Acknowledgements. The authors gratefully acknowledge the AiF for funding the IGF work 17838 N / 4 of the research association Gas- und Wärme-Institut Essen e.V.- GWI, Hafenstraße 101, 45356 Essen, Germany, in the framework of the industrial common research (IGF) of the Federal Ministry of Economics and Technology based on a resolution of the German Federal Parliament.

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