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ISSN Online: 2377-424X

ISBN Print: 1-56032-797-9

International Heat Transfer Conference 11
August, 23-28, 1998, Kyongju, Korea

AN INVESTIGATION OF THE EFFECT OF GASES ON THERMAL GAP CONDUCTANCE AT LOW CONTACT PRESSURES

Get access (open in a dialog) DOI: 10.1615/IHTC11.790
pages 95-100

Аннотация

An experimental investigation to find the variation in contact conductance when the interface contains gas mixtures is described. Experiments were performed to measure gap conductance for stainless steel 304 pairs. The gas pressure was slightly above atmospheric. The mixture employed as the interstitial gas consists of high purity helium (99.99%) and high purity argon (99.99%) mixed in specified proportions. The heat transfer across the interface was found to depend on gas composition in the gap and temperature at the interface. For the rough surfaces with low contact pressure as tested in the present work, it was observed that the gas gap conduction predominates.