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Permeability and Porosity of Bonded Hollow Sphere Foams for High Intensity Radiant Burners

  • J. E. McEntyre (a1), J. K. Cochran (a1) and K. J. Lee (a2)


Bonded hollow sphere foams for this study were made from point-contact, slurry-bonded monosized spheres, 2.5 mm in diameter. The permeabilities of these foams are compatible with the diffuser base in radiant burners. For this study, the effect of quantity of bonding phase on interstitial porosity, permeability, and uniformity of gas flow through the foams was investigated. The relationship between permeability and porosity was modeled with the Kozeny-Carman equation. Attempts were made to correlate diffuser base permeability to operating characteristics of these burners.



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1. Tidball, R.K., Donaldson, R.J., and Gotterba, J.A., Radiant Burner Technology: Base Burner Research and Development, Final Report, Gas Research Institute Contract No. 5086–234–1286. Chicago, Illinois, March 1989.
2. Chapman, A.T., Cochran, J.K., Britt, J.M. and Hwang, T.J., “Thin-Wall Hollow Ceramic Spheres from Slurries,” DEO-ECUT Subcontract 86X-22043 C, Georgia Institute of Technology, 1986/
3. Collins, R.E., The Flow of Fluids Through Porous Media, Academic Press, Reinhold, New York, 1961.
4. Touryan, , Laura, , Permeability of Millimeter Sized Consolidated Hollow Ceramic Spheres, M.S. Thesis, Georgia Institute of Technology, Atlanta, Georgia, 1992.
5. Fand, R.M., et al, “Resistance to the Flow of Fluids Through Simple and Complex Porous Media Whose Matrices are Composed of Randomly Packed Spheres,” Transactions of the ASME, 109, September 1987, p.268274.
6. Cochran, J.K., Lee, K.J., Hwang, T.J., and McEntyre, J.E., “Ceramic Foams for Radiant Burners,” Project Review, Gas Research Institute Radiant Structures Meeting, September 1994.


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