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Effects of horizontal and vertical spacers on the heat transfer across a horizontal, annular, air-filled cavity

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  • Shilston, M.J.
  • Probert, S.D.

Abstract

Flow patterns and temperature profiles, as well as local and overall heat transfer coefficients, were measured for a horizontal, annular cavity, containing air at atmospheric pressure. The radius ratio of the bounding surfaces of the cavity was 1·5, the inner cylinder being heated. The insertion of two horizontal, radial, co-planar spacers bridging the 18·9 mm cavity along its whole length, reduced the convective rate of heat transfer from the surface of the inner cylinder whereas the same co-planar spacers, if vertical, led to an increased rate of convective heat transfer. Flow instabilities, encountered in the plain cavity, were also eliminated by the insertion of the horizontal spacers.

Suggested Citation

  • Shilston, M.J. & Probert, S.D., 1978. "Effects of horizontal and vertical spacers on the heat transfer across a horizontal, annular, air-filled cavity," Applied Energy, Elsevier, vol. 4(1), pages 21-37, January.
    • Handle: RePEc:eee:appene:v:4:y:1978:i:1:p:21-37
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