The determination of the heat release in technical flames is commonly done via bandpass filtered chemiluminescence measurements in the wavelength range of or radicals, which are supposed to be a measure for the heat release rate. However, these indirect heat release measurements are problematic because the measured intensities are the superposition of the desired radical emissions and contributions from the broadband emissions of . Furthermore, the chemiluminescence intensities are strongly affected by the local air excess ratio of the flame and the turbulence intensity in the reaction zone. To investigate the influence of these effects on the applicability of chemiluminescence as a measure for the heat release rate in turbulent flames with mixture gradients, a reference method is used, which is based on the first law of thermodynamics. It is shown that although the integral heat release can be correlated with the integral chemiluminescence intensities, the heat release distribution is not properly represented by any signal from or . No reliable information about the spatially resolved heat release can be obtained from chemiluminescence measurements in flames with mixture gradients.
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June 2010
Research Papers
On the Adequacy of Chemiluminescence as a Measure for Heat Release in Turbulent Flames With Mixture Gradients
Martin Lauer,
Martin Lauer
Lehrstuhl für Thermodynamik,
e-mail: lauer@td.mw.tum.de
Technische Universität München
, Boltzmannstraße 15, 85748 Garching, Germany
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Thomas Sattelmayer
Thomas Sattelmayer
Lehrstuhl für Thermodynamik,
Technische Universität München
, Boltzmannstraße 15, 85748 Garching, Germany
Search for other works by this author on:
Martin Lauer
Lehrstuhl für Thermodynamik,
Technische Universität München
, Boltzmannstraße 15, 85748 Garching, Germanye-mail: lauer@td.mw.tum.de
Thomas Sattelmayer
Lehrstuhl für Thermodynamik,
Technische Universität München
, Boltzmannstraße 15, 85748 Garching, GermanyJ. Eng. Gas Turbines Power. Jun 2010, 132(6): 061502 (8 pages)
Published Online: March 18, 2010
Article history
Received:
April 9, 2009
Revised:
April 14, 2009
Online:
March 18, 2010
Published:
March 18, 2010
Citation
Lauer, M., and Sattelmayer, T. (March 18, 2010). "On the Adequacy of Chemiluminescence as a Measure for Heat Release in Turbulent Flames With Mixture Gradients." ASME. J. Eng. Gas Turbines Power. June 2010; 132(6): 061502. https://doi.org/10.1115/1.4000126
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