20 September 1995 3D density and temperature-measurements in an oil-spray flame using UV Raman scattering
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Proceedings Volume 2506, Air Pollution and Visibility Measurements; (1995) https://doi.org/10.1117/12.221013
Event: European Symposium on Optics for Environmental and Public Safety, 1995, Munich, Germany
Abstract
In order to get an understanding of the turbulent air-fuel mixing behavior and the subsequent combustion process of technically applied spray flames, spontaneous Raman scattering investigations were carried out in the flame of a commercial oil burning furnace. In this furnace a spray of liquid n-heptane is turbulently mixed with air by a swirl generating mixing device. The present geometry of the burner head creates a nonsymmetrical flame so that it was necessary to observe the whole flame volume in order to achieve meaningful data of the mixing behavior. For this reason spontaneous Raman scattering in combination with spatially resolving OMA-detection was applied. Using a simple polarization technqiue in addition to signal averaging over several hundred laser shots, broadband emissions of reacting hydrocarbons are suppressed effectively. This experimental setup facilitates simultaneous 1D spatial resolution of all majority species densities (fuel, N2, O2, CO2, and H2O) along the axis of the focused laser beam. Scanning the whole flame volume by the laser beam then offers 3D information. Quantitative densities of all majority species and the mean temperature were gained using calibration objects. The investigations offer information of stable recurring structures inside the turbulent spray flame. New insights into the mixing and combustion behavior of technically applied combustion systems were gained which are very promising for designing new burner head geometries in order to achieve more effective NO- reduction.
© (1995) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
A. Luczak, Sebastian Eisenberg, H. Schlueter, Volker Beushausen, P. Andresen, "3D density and temperature-measurements in an oil-spray flame using UV Raman scattering", Proc. SPIE 2506, Air Pollution and Visibility Measurements, (20 September 1995); doi: 10.1117/12.221013; https://doi.org/10.1117/12.221013
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