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Related Concept Videos

Flame Photometry: Overview01:02

Flame Photometry: Overview

Flame photometry, also known as flame emission spectrometry, is a technique used for the qualitative and quantitative analysis of elements present in a sample using a flame as the source of excitation energy. The concept of flame photometry was realized in the early 1860s by Kirchhoff and Bunsen, who discovered that specific elements emit characteristic radiation when excited in flames. The first instrument developed for this purpose was used to measure sodium (Na) in plant ash using a Bunsen...
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Related Experiment Video

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Experimental Methodology for Estimation of Local Heat Fluxes and Burning Rates in Steady Laminar Boundary Layer Diffusion Flames
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Two-dimensional temperature measurements in a technical combustor with laser Rayleigh scattering.

S Kampmann, A Leipertz, K Döbbeling

    Applied Optics
    |September 22, 2010
    PubMed
    Summary

    This study pioneers the use of two-dimensional laser Rayleigh scattering for temperature measurements in industrial swirl combustors. The technique quantitatively maps temperature fields, revealing flame stabilization by a central recirculation zone.

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    Area of Science:

    • Combustion science
    • Laser-based diagnostics
    • Turbulent flow analysis

    Background:

    • Industrial combustors require precise temperature monitoring for efficiency and emission control.
    • Laser Rayleigh scattering offers a non-intrusive method for temperature measurements.
    • Previous applications have been limited to smaller-scale or different combustion environments.

    Purpose of the Study:

    • To apply two-dimensional laser Rayleigh scattering for quantitative temperature measurements in a large-scale industrial combustor.
    • To analyze the temperature fields and flame structure of a premixed, turbulent, low-emission swirl combustor.
    • To validate the technique's applicability in a real-world industrial setting.

    Main Methods:

    • Utilized two-dimensional laser Rayleigh scattering for instantaneous, quantitative temperature field measurements.
    • Performed measurements at various downstream positions within a 150-kW industrial swirl combustor.
    • Implemented minor combustor modifications to mitigate signal interference from Mie scattering and laser reflections.

    Main Results:

    • Successfully obtained quantitative, instantaneous temperature field data.
    • Calculated ensemble-averaged temperature distributions.
    • Confirmed flame stabilization by a central recirculation zone through temperature mapping.

    Conclusions:

    • Two-dimensional laser Rayleigh scattering is effectively applied to large-scale industrial combustors for the first time.
    • The technique provides valuable insights into turbulent flame structure and temperature distribution.
    • This method aids in optimizing combustor design for low-emission performance.