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An experimental study of turbulence intensities and non-uniformities in the exit flow from a porous combustor

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Abstract

In this study, experiments were performed on a two-section porous burner operated on propane and air. The burner consisted of an upstream section of reticulated yttria stabilized zirconia with 23.6 pores per centimeter (ppc) followed by a downstream section of 3.9 ppc, composed of the same material. The velocity and turbulence intensity of the exit flow for reacting and non-reacting conditions were measured. The velocity profiles for both reacting and non-reacting flow were very non-uniform. The turbulence intensity for the reacting flow increased with distance due to turbulence created by the non-uniformities. Blow-off occurred first on one side of the burner, but otherwise the flame in this burner was stable.

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Acknowledgments

The authors would like to acknowledge the support provided by Applied Research Laboratories, University of Texas Austin, and Porvair Corporation for supplying the ceramic foams used in this research. We would also like to thank Ben Pouliquen who took the pressure drop measurements.

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Correspondence to J. A. Wharton.

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Wharton, J.A., Ellzey, J.L. & Bogard, D.G. An experimental study of turbulence intensities and non-uniformities in the exit flow from a porous combustor. Exp Fluids 38, 701–707 (2005). https://doi.org/10.1007/s00348-004-0874-3

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  • DOI: https://doi.org/10.1007/s00348-004-0874-3

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